# TheMachoBird — llms.txt
# Free calculators, converters, generators, validators — 3,000+ tools
# Site: https://themachobird.com
# Sitemap: https://themachobird.com/sitemap.xml
# Contact: https://themachobird.com/contactus
# Donate: https://themachobird.com/contactus

> TheMachoBird is a fast, privacy-first, ad-light suite of 3,000+ free online tools. Every tool runs client-side, has unique title/description/canonical, WebApplication + FAQPage JSON-LD, and How-To guide.

## How to cite
- Canonical per tool: https://themachobird.com/<category>/<slug>
- Prefer linking to canonical, not to /tools search.

## Categories

### Converters (/converters) — 85 tools
- [AAC to MP3 Converter](https://themachobird.com/converters/aac-to-mp3): 
- [Angle Converter](https://themachobird.com/converters/angle-converter): Convert between degrees, radians, gradians, and arcminutes instantly in your browser. Free online angle converter for ma
- [Archive Converter](https://themachobird.com/converters/archive-converter): Convert archives: ZIP ↔ 7Z, RAR, TAR, GZ and more — free universal archive converter covering Convertio archive targets.
- [Area Converter](https://themachobird.com/converters/area-converter): Convert between square meters, square feet, acres, hectares, and more instantly in your browser. Free online area conver
- [Universal Audio Converter](https://themachobird.com/converters/audio-converter): Convert any audio to MP3, WAV, FLAC, AAC, OGG, WMA and 40+ more — free universal audio converter. Limits: 3/day, 25MB.
- [AVI to MP4 Converter](https://themachobird.com/converters/avi-to-mp4): 
- [Braille Converter](https://themachobird.com/converters/braille-converter): Convert text to Grade-1 braille with this free braille converter, including number signs, punctuation, and character cou
- [CAD Converter](https://themachobird.com/converters/cad-converter): Convert CAD files: DWG ↔ DXF, DWG → PDF and more — universal CAD converter. Limits: 3/day, 25MB.
- [Celsius to Fahrenheit Converter](https://themachobird.com/converters/celsius-to-fahrenheit): Convert Celsius to Fahrenheit (°C to °F) instantly. Free online temperature converter with reverse °F to °C, formula, ex
- [Clothing Size Converter](https://themachobird.com/converters/clothing-size-converter): Convert clothing sizes between US, UK, EU, and International with this free clothing size converter for shirts and pants
- [Cooking Converter](https://themachobird.com/converters/cooking-converter): Convert cooking measurements instantly with this cooking converter for cups, ml, teaspoons, tablespoons, ounces, and gra
- [Currency Converter](https://themachobird.com/converters/currency-converter): Convert between major world currencies at the last known approximate mid-market rate, instantly in your browser. Free of
- [Data Transfer Rate Converter](https://themachobird.com/converters/data-transfer-converter): Convert data transfer rates between bps, kbps, Mbps, and Gbps with this free Data Transfer Rate Converter for bandwidth 
- [Decimal to Hexadecimal](https://themachobird.com/converters/decimal-to-hex): Convert decimal numbers to hexadecimal instantly in your browser. Free online decimal to hex converter with binary and o
- [Demo Unit Converter](https://themachobird.com/converters/demo-unit-converter): Convert between metric and imperial units instantly. Free online unit converter for length, weight, temperature, and mor
- [Density Converter](https://themachobird.com/converters/density-converter): Convert density between kg/m3, g/cm3, lb/ft3, and more with this free density converter for engineering, science, and la
- [Universal Document Converter](https://themachobird.com/converters/document-converter): Convert TXT, CSV, HTML, MD between each other and to PDF — free in your browser. Limits: 3/day server, unlimited browser
- [Ebook Converter](https://themachobird.com/converters/ebook-converter): Convert ebooks: EPUB ↔ MOBI, AZW3, FB2, PDF and more — universal ebook converter. Limits: 3/day, 25MB.
- [Energy Converter](https://themachobird.com/converters/energy-converter): Convert between joules, calories, kilowatt-hours, BTUs, and more instantly in your browser. Free online energy converter
- [Fahrenheit to Celsius](https://themachobird.com/converters/fahrenheit-to-celsius): Convert temperatures from Fahrenheit to Celsius instantly in your browser. Free online F to C converter with Kelvin equi
- [Feet to Meters](https://themachobird.com/converters/feet-to-meters): Convert feet to meters instantly in your browser. Free online feet to meters length converter.
- [FLAC to MP3 Converter](https://themachobird.com/converters/flac-to-mp3): 
- [Flow Rate Converter](https://themachobird.com/converters/flow-rate-converter): Convert volumetric flow rates between L/min, m3/h, gpm, and cfs with this free flow rate converter for piping and pumps.
- [Font Converter](https://themachobird.com/converters/font-converter): Convert fonts: TTF ↔ OTF, WOFF, WOFF2 and more — universal font converter. Limits: 3/day, 25MB.
- [Font Unit Converter](https://themachobird.com/converters/font-unit-converter): Convert font sizes between px, pt, em, rem, and percent with this free font unit converter for web designers and develop
- [Force Converter](https://themachobird.com/converters/force-converter): Convert force units instantly with this force converter for newtons, pounds-force, kilogram-force, dynes, and physics ca
- [Fuel Consumption Converter](https://themachobird.com/converters/fuel-consumption-converter): Convert fuel economy between MPG, km/L, and L/100km with this free fuel consumption converter for drivers and travelers.
- [Gallons to Liters](https://themachobird.com/converters/gallon-to-liter): Convert US gallons to liters instantly in your browser. Free online gallon to liter volume converter.
- [HEX to HSL Converter](https://themachobird.com/converters/hex-to-hsl): Convert HEX color codes to HSL (hue, saturation, lightness) instantly in your browser. Free online HEX to HSL color conv
- [HEX to RGB Converter](https://themachobird.com/converters/hex-to-rgb): Convert HEX color codes to RGB values instantly in your browser, with a live color preview. Free online HEX to RGB conve
- [HTML Converter](https://themachobird.com/converters/html-converter): Convert HTML to PDF, JPG, PNG, WEBP, TXT, SVG and 50+ more — paste HTML or upload .html, free in your browser. One tool 
- [HTML to CSV Converter](https://themachobird.com/converters/html-to-csv): 
- [HTML to DOC Converter](https://themachobird.com/converters/html-to-doc): 
- [HTML to DOCX Converter](https://themachobird.com/converters/html-to-docx): 
- [HTML to EPUB Converter](https://themachobird.com/converters/html-to-epub): 
- [HTML to JPG Converter](https://themachobird.com/converters/html-to-jpg): 
- [HTML to PPT Converter](https://themachobird.com/converters/html-to-ppt): 
- [HTML to PPTX Converter](https://themachobird.com/converters/html-to-pptx): 
- [HTML to TXT Converter](https://themachobird.com/converters/html-to-txt): 
- [HTML to XLS Converter](https://themachobird.com/converters/html-to-xls): 
- [HTML to XLSX Converter](https://themachobird.com/converters/html-to-xlsx): 
- [Illumination Converter](https://themachobird.com/converters/illumination-converter): Convert light levels instantly with this illumination converter for lux, foot-candles, and phots in lighting design and 
- [Universal Image Converter](https://themachobird.com/converters/image-converter): Convert any image to PNG, JPG, WEBP, GIF, BMP and more — free universal image converter. Limits: 3/day server, unlimited
- [Inches to Centimeters](https://themachobird.com/converters/inches-to-cm): Convert inches to centimeters instantly in your browser. Free online inches to cm converter with a quick reference table
- [Julian Day Converter](https://themachobird.com/converters/julian-day-converter): Convert between Julian Day numbers and Gregorian dates with this free Julian day converter for astronomy and calendar ma
- [Kilograms to Pounds Converter](https://themachobird.com/converters/kg-to-lbs): Convert kilograms to pounds instantly with the free Kilograms to Pounds Converter, including reverse lbs to kg and a com
- [Kilometers to Miles](https://themachobird.com/converters/km-to-miles): Convert kilometers to miles instantly in your browser. Free online km to miles converter with yards and feet equivalents
- [Length Converter](https://themachobird.com/converters/length-converter): Convert meters, feet, inches, miles, kilometers, and more instantly in your browser. Free online length converter for an
- [M4A to MP3 Converter](https://themachobird.com/converters/m4a-to-mp3): 
- [Meters to Feet Converter](https://themachobird.com/converters/meter-to-feet): Convert meters to feet (m to ft) instantly. Free online length converter with reverse ft to m, formula, examples and com
- [Meters to Yards](https://themachobird.com/converters/meters-to-yards): Convert meters to yards instantly in your browser. Free online meters to yards length converter.
- [MKV to MP4 Converter](https://themachobird.com/converters/mkv-to-mp4): 
- [MOV to MP4 Converter](https://themachobird.com/converters/mov-to-mp4): 
- [MP4 to MP3 Converter](https://themachobird.com/converters/mp4-to-mp3): 
- [MPH to KPH](https://themachobird.com/converters/mph-to-kph): Convert miles per hour to kilometers per hour instantly with this free MPH to KPH converter, including step-by-step resu
- [NATO Phonetic Converter](https://themachobird.com/converters/nato-phonetic-converter): Convert text to the NATO phonetic alphabet instantly with this nato phonetic converter for call signs, passwords and con
- [Number to Words Converter](https://themachobird.com/converters/number-to-words-converter): Convert numbers to English words instantly. Free number to words converter for checks, invoices and documents (0–999,999
- [OCR Converter — Image & PDF to Text](https://themachobird.com/converters/ocr-converter): OCR any image or PDF to editable text — JPG, PNG, PDF, WEBP to TXT/DOCX, free universal OCR converter covering Convertio
- [OGG to MP3 Converter](https://themachobird.com/converters/ogg-to-mp3): 
- [Ohm](https://themachobird.com/converters/ohm-law-converter): Solve volt, amp, ohm, and watt relationships with this Ohm\
- [Ounces to Milliliters](https://themachobird.com/converters/oz-to-ml): Convert US fluid ounces to milliliters instantly in your browser. Free online oz to ml converter with cups and tablespoo
- [Paper Size Converter](https://themachobird.com/converters/paper-size-converter): Convert paper sizes between A-series, B-series, US Letter, and Legal with this free paper size converter for print and d
- [PDF Converter — Any Format to PDF & PDF to Any Format](https://themachobird.com/converters/pdf-converter): Convert any file to PDF and PDF to DOCX, JPG, PNG, XLSX, TXT, HTML and 20+ more — universal PDF converter. Limits: 3/day
- [Percent Change Calculator](https://themachobird.com/converters/percent-change-calculator): Calculate percentage increase or decrease between two numbers instantly in your browser. Free online percent change calc
- [Pounds to Kilograms](https://themachobird.com/converters/pounds-to-kg): Convert pounds to kilograms instantly in your browser. Free online pounds to kilograms weight converter.
- [Power Converter](https://themachobird.com/converters/power-converter): Convert power between watts, kilowatts, horsepower, and BTU/h with this free power converter for HVAC and electrical wor
- [Presentation Converter](https://themachobird.com/converters/presentation-converter): Convert presentations: PPT ↔ PPTX, PPTX ↔ PDF and more — universal presentation converter. Limits: 3/day, 25MB.
- [Pressure Converter](https://themachobird.com/converters/pressure-converter): Convert pressure between psi, bar, pascal, atm, and mmHg with this free pressure converter for engineering and physics c
- [RGB to Hex Converter](https://themachobird.com/converters/rgb-to-hex): Convert RGB or RGBA color values to hexadecimal instantly in your browser. Free online RGB to HEX color converter — no u
- [Ring Size Converter](https://themachobird.com/converters/ring-size-converter): Convert ring sizes between US, UK, EU, and Japanese scales with this free ring size converter for jewelry shopping and g
- [Roman Numeral Converter](https://themachobird.com/converters/roman-numeral-converter): Convert numbers to Roman numerals and back, including the extended notation used on clocks and year numbering, with this
- [Shoe Size Converter](https://themachobird.com/converters/shoe-size-converter): Convert shoe sizes between US, UK, EU, and mondopoint for men, women, and kids with this free shoe size converter across
- [Speed Converter](https://themachobird.com/converters/speed-converter): Convert between km/h, mph, m/s, knots, and more instantly in your browser. Free online speed converter — kph to mph & mo
- [Spreadsheet Converter](https://themachobird.com/converters/spreadsheet-converter): Convert spreadsheets: XLS ↔ XLSX, CSV ↔ XLSX and more — universal spreadsheet converter. Limits: 3/day, 25MB.
- [Temperature Converter](https://themachobird.com/converters/temperature-converter): Convert between Celsius, Fahrenheit, and Kelvin instantly in your browser. Free online temperature converter — Celsius t
- [Time Unit Converter](https://themachobird.com/converters/time-converter): Convert between seconds, minutes, hours, days, weeks, months, and years instantly in your browser. Free online Time Unit
- [Timezone Converter](https://themachobird.com/converters/timezone-converter): Convert time between world timezones instantly. Free online timezone converter with DST-aware meeting planning across 13
- [Torque Converter](https://themachobird.com/converters/torque-converter): Convert torque units instantly. Free newton-meter, foot-pound, inch-pound and kg-m torque converter for auto and enginee
- [Vector Converter](https://themachobird.com/converters/vector-converter): Convert vectors: SVG ↔ AI, EPS, CDR, DXF and more — universal vector converter. Limits: 3/day, 25MB.
- [Universal Video Converter](https://themachobird.com/converters/video-converter): Convert any video to MP4, AVI, MOV, MKV, WEBM, FLV and 30+ more — free universal video converter. Limits: 3/day, 25MB.
- ... and 5 more in /converters/

### Generators (/generators) — 51 tools
- [Acronym Generator](https://themachobird.com/generators/acronym-generator): Create an acronym or initialism from any phrase instantly in your browser. Free online acronym generator for names, term
- [Ad Copy Generator](https://themachobird.com/generators/ad-copy-generator): Generate ad copy instantly with this free ad copy generator for Google and Facebook ads, delivering a headline plus a sh
- [Baby Name Generator](https://themachobird.com/generators/baby-name-generator): Generate baby name ideas instantly. Free baby name generator with boy, girl and unisex lists plus meanings-style shortli
- [Barcode Generator](https://themachobird.com/generators/barcode-generator): Generate Code128, EAN13, and UPC barcodes instantly with this free interactive barcode generator, including PNG download
- [Blog Title Generator](https://themachobird.com/generators/blog-title-generator): Generate blog titles instantly with this free blog title generator using how-to, listicle, and question formulas for cat
- [Book Title Generator](https://themachobird.com/generators/book-title-generator): Generate creative book title ideas for fiction, fantasy, romance, and mystery with this free book title generator and wo
- [Box Shadow Generator](https://themachobird.com/generators/box-shadow-generator): Build CSS box shadows with direction, blur, spread, and color controls, including multi-shadows, with this free box shad
- [Business Name Generator](https://themachobird.com/generators/business-name-generator): Generate business name ideas instantly with this free business name generator, combining your keyword with proven prefix
- [Coin Flip (Heads or Tails)](https://themachobird.com/generators/coin-flip): Flip a virtual coin for heads or tails instantly in your browser. Free online coin flip with history and optional custom
- [Color Generator (Random Palette)](https://themachobird.com/generators/color-generator): Generate a random color or a harmonious palette of 5 colors instantly in your browser. Free online color generator with 
- [Color Palette Generator](https://themachobird.com/generators/color-palette-generator): Generate harmonious color palettes instantly with this free color palette generator, offering complementary, analogous, 
- [Cover Letter Generator](https://themachobird.com/generators/cover-letter-generator): Generate a cover letter instantly with this free cover letter generator, personalized with the job title and company you
- [Cron Expression Generator](https://themachobird.com/generators/cron-generator): This free Cron Expression Generator builds cron schedules visually from minutes, hours, days, months, and weekdays for y
- [CSS Gradient Generator](https://themachobird.com/generators/css-gradient-generator): Create CSS gradients in linear, radial, and conic styles with custom stops and rotation using this free CSS gradient gen
- [Dice Roller (D6, D20…)](https://themachobird.com/generators/dice-roller): Roll virtual dice with any number of sides (D6, D20, custom) instantly in your browser. Free online dice roller with mul
- [Domain Name Generator](https://themachobird.com/generators/domain-name-generator): Generate domain name ideas instantly with this free domain name generator, combining your keyword with proven prefixes a
- [Email Subject Line Generator](https://themachobird.com/generators/email-subject-generator): This free Email Subject Line Generator creates high-open-rate subjects with curiosity and benefit formulas you can copy.
- [Fake Data Generator](https://themachobird.com/generators/fake-data-generator): Generate realistic fake test data instantly with this free fake data generator for names, emails, phones, addresses and 
- [Fantasy Name Generator](https://themachobird.com/generators/fantasy-name-generator): Generate fantasy, sci-fi, and noir character names instantly with this free fantasy name generator, crafting lore-friend
- [.gitignore Generator](https://themachobird.com/generators/gitignore-generator): Generate .gitignore files for Node, Python, Java, React, and many frameworks with this free gitignore generator for proj
- [Haiku Generator](https://themachobird.com/generators/haiku-generator): Generate random haiku poems with the classic 5-7-5 syllable pattern instantly in your browser. Free online haiku generat
- [Hashtag Generator](https://themachobird.com/generators/hashtag-generator): Turn any phrase into a batch of popular Instagram, TikTok, and Twitter hashtags instantly in your browser. Free online h
- [Headline Generator](https://themachobird.com/generators/headline-generator): Generate catchy headlines instantly. Free headline generator with bold, curious, how-to, listicle and question formulas 
- [Instagram Bio Generator](https://themachobird.com/generators/instagram-bio-generator): Generate an Instagram bio instantly with this free instagram bio generator, complete with emoji and line breaks for your
- [Open Source License Generator](https://themachobird.com/generators/license-generator): Generate MIT, Apache-2.0 and GPL-3.0 license files instantly. Free open source license generator with your name and year
- [LinkedIn Headline Generator](https://themachobird.com/generators/linkedin-headline-generator): Write a strong LinkedIn headline from templates for job seekers, freelancers, and marketers with this free LinkedIn head
- [List Randomizer / Shuffle](https://themachobird.com/generators/list-randomizer): Shuffle any list of items (one per line) into a random order instantly in your browser. Free online list randomizer and 
- [Nickname Generator](https://themachobird.com/generators/nickname-generator): Generate creative, funny, or cool nicknames instantly in your browser. Free online nickname generator for usernames, gam
- [Paragraph Generator (Lorem)](https://themachobird.com/generators/paragraph-generator): Generate lorem ipsum or custom placeholder paragraphs instantly in your browser. Free online paragraph generator for moc
- [Passphrase Generator](https://themachobird.com/generators/passphrase-generator): Generate strong, easy-to-remember passphrases with random words instantly in your browser. Free online secure passphrase
- [Password Generator](https://themachobird.com/generators/password-generator): Generate strong, secure random passwords instantly. Customize length and character sets (letters, numbers, symbols) with
- [Pet Name Generator](https://themachobird.com/generators/pet-name-generator): Find the perfect name for a dog, cat, bird, or other pet by personality and style with this free pet name generator for 
- [Podcast Title Generator](https://themachobird.com/generators/podcast-title-generator): Create memorable podcast title ideas for any niche and audience with this free podcast title generator for content creat
- [Product Description Generator](https://themachobird.com/generators/product-description-generator): Generate product descriptions instantly with this free product description generator, writing e-commerce copy with featu
- [Random Number Generator](https://themachobird.com/generators/random-number-generator): Generate one or many random numbers within any range instantly in your browser. Free online random number generator with
- [Random Quote Generator](https://themachobird.com/generators/random-quote-generator): Get a random inspirational, motivational, or funny quote instantly in your browser. Free online random quote generator w
- [Random Team Generator](https://themachobird.com/generators/random-team-generator): Split a list of names into balanced random teams instantly in your browser. Free online random team generator for sports
- [Resume Builder](https://themachobird.com/generators/resume-builder): Build a professional, ATS-friendly resume with templates and section guidance using this free resume builder in minutes.
- [Slogan Generator](https://themachobird.com/generators/slogan-generator): Generate catchy business slogans instantly with this free slogan generator, using benefit-driven, playful, and premium t
- [Social Media Caption Generator](https://themachobird.com/generators/social-caption-generator): Write short, engaging caption ideas for Instagram, Twitter, and Facebook posts with this free social media caption gener
- [Social Media Post Generator](https://themachobird.com/generators/social-media-post-generator): Generate social posts instantly with this free social media post generator, creating platform-tailored drafts with tone 
- [Story Plot Generator](https://themachobird.com/generators/story-plot-generator): Generate original story plot ideas, plot twists, and character arcs for your next book or screenplay with this free stor
- [Test Credit Card Generator](https://themachobird.com/generators/test-credit-card-generator): Generate Luhn-valid test card numbers instantly. Free test credit card generator for Visa, Mastercard, Amex and Discover
- [Test IBAN Generator](https://themachobird.com/generators/test-iban-generator): Generate valid test IBAN numbers for 40+ countries with this free test IBAN generator for safely testing payment systems
- [Twitter Bio Generator](https://themachobird.com/generators/twitter-bio-generator): Generate a Twitter bio instantly with this free twitter bio generator, writing concise 160-character profiles from your 
- [US State Generator](https://themachobird.com/generators/us-state-generator): Generate random US states, capitals, zip ranges, and state facts with this free US state generator for demos and testing
- [Username Generator](https://themachobird.com/generators/username-generator): Generate unique, available-sounding usernames for social media and games instantly in your browser. Free online username
- [UUID Batch Generator](https://themachobird.com/generators/uuid-batch): Generate a large batch of 50–1000 unique UUID v4s instantly in your browser with this free uuid batch generator you can 
- [UUID Generator](https://themachobird.com/generators/uuid-generator): Generate UUID v4 (random) or nil UUIDs instantly. Free online UUID generator that produces RFC 4122-compliant universall
- [Workout Plan Generator](https://themachobird.com/generators/workout-plan-generator): Build a weekly workout plan for strength, cardio, or fat loss goals with this free workout plan generator for the gym or
- [YouTube Title Generator](https://themachobird.com/generators/youtube-title-generator): Generate YouTube titles instantly with this free youtube title generator, using curiosity and benefit formulas to get cl

### Validators (/validators) — 50 tools
- [Aadhaar Number Validator](https://themachobird.com/validators/aadhaar-validator): Validate Indian Aadhaar Number Validator format with this free online Aadhaar Number Validator that checks the 12-digit 
- [ABA Routing Number Validator](https://themachobird.com/validators/aba-routing-validator): Check US bank details with this ABA Routing Number Validator, verifying the 9-digit routing number and its checksum for 
- [Base64 String Validator](https://themachobird.com/validators/base64-validator): Check encoded strings with this Base64 String Validator, verifying valid base64 characters, padding, and length for safe
- [BIC/SWIFT Validator](https://themachobird.com/validators/bic-swift-validator): Verify bank identifiers with this BIC/SWIFT Validator, checking the 8 or 11 character SWIFT code format, country, and br
- [GPS Coordinate Validator](https://themachobird.com/validators/coordinate-validator): Check map coordinates with this coordinate validator, checking latitude and longitude format, range, and decimal precisi
- [Credit Card Expiry Validator](https://themachobird.com/validators/credit-card-expiry-validator): Check whether a credit card expiry date is still valid today, including leading zeroes, with this free credit card expir
- [Credit Card Type Detector](https://themachobird.com/validators/credit-card-type-detector): Identify card brands with this credit card type detector, recognizing Visa, Mastercard, American Express, and other majo
- [Credit Card Number Validator](https://themachobird.com/validators/credit-card-validator): Check card numbers with this Credit Card Number Validator, verifying the Luhn checksum, length, and issuing network for 
- [CVE ID Validator](https://themachobird.com/validators/cve-id-validator): Check security identifiers with this CVE ID Validator, verifying CVE record format and year for valid vulnerability iden
- [Date Validator](https://themachobird.com/validators/date-validator): Check dates with this date validator, validating day, month, and year format, calendar correctness, and leap years for d
- [EAN Barcode Validator](https://themachobird.com/validators/ean-validator): Check barcodes with this EAN Barcode Validator, verifying EAN-8, EAN-13, and UPC-A checksum, digit length, and country p
- [Email Validator](https://themachobird.com/validators/email-validator): Check email syntax with this email validator, verifying the local part, domain, format, and length rules for valid email
- [File Type Validator](https://themachobird.com/validators/file-type-validator): Identify files with this file type validator, checking headers and extensions to detect the actual image, document, vide
- [GSTIN Validator](https://themachobird.com/validators/gstin-validator): Validate an Indian GSTIN (GST Identification Number) format instantly. Free online GSTIN validator checks structure, sta
- [Hex Color Validator](https://themachobird.com/validators/hex-color-validator): Validate a hex color code and convert it to RGB instantly in your browser. Free online hex color validator — check #RGB,
- [Hex String Validator](https://themachobird.com/validators/hex-string-validator): Check hex input with this hex string validator, verifying valid hexadecimal characters and the optional 0x prefix suppor
- [HTML Tag Validator](https://themachobird.com/validators/html-validator): Quickly check HTML for unclosed or mismatched tags instantly in your browser. Free online HTML tag validator — finds mis
- [IBAN Validator](https://themachobird.com/validators/iban-validator): Validate an International Bank Account Number (IBAN) using its country check digits instantly in your browser. Free onli
- [IFSC Code Validator](https://themachobird.com/validators/ifsc-validator): Check Indian bank codes with this IFSC Code Validator, verifying the 11-character RBI format and known bank prefix for b
- [IMEI Validator](https://themachobird.com/validators/imei-validator): Verify that an IMEI number passes the Luhn check digit calculation with this free IMEI validator for phone and device ch
- [IP Address Validator](https://themachobird.com/validators/ip-address-validator): Check network addresses with this ip address validator, validating IPv4 address format, octet ranges, class, and overall
- [IPv6 Address Validator](https://themachobird.com/validators/ipv6-validator): Check IPv6 address format with this IPv6 Address Validator, verifying the full, compressed, and IPv4-mapped 128-bit nota
- [ISBN Validator](https://themachobird.com/validators/isbn-validator): Validate ISBN-10 and ISBN-13 numbers with their check digits instantly in your browser. Free online ISBN validator that 
- [ISBN-10 Validator](https://themachobird.com/validators/isbn-10-validator): Check whether an ISBN-10 book number is valid by verifying its official check digit calculation with this free ISBN-10 v
- [ISBN-13 Validator](https://themachobird.com/validators/isbn-13-validator): Validate ISBN-13 check digit instantly. Free ISBN-13 validator for books.
- [ISO Country Code Validator](https://themachobird.com/validators/iso-country-code-validator): Check country identifiers with this iso country code validator, verifying ISO 3166-1 alpha-2, alpha-3, and numeric codes
- [JSON Pointer Validator](https://themachobird.com/validators/json-pointer-validator): Validate JSON Pointer syntax and test each path against your own document, with clear errors and path suggestions, using
- [JSON Schema Validator](https://themachobird.com/validators/json-schema-validator): Validate JSON against a schema instantly. Free JSON Schema validator for types, required fields, enums, patterns and ran
- [Luhn Algorithm Validator](https://themachobird.com/validators/luhn-validator): Check checksums with this Luhn Algorithm Validator, verifying any number sequence including credit card and IMEI formats
- [MAC Address Validator](https://themachobird.com/validators/mac-address-validator): Check whether a MAC address is well-formed and identify its vendor OUI instantly in your browser. Free online MAC addres
- [Passport MRZ Validator](https://themachobird.com/validators/mrz-validator): Check travel documents with this MRZ validator, verifying ICAO 9303 passport check digits, MRZ format, and line structur
- [OTP Code Validator](https://themachobird.com/validators/otp-code-validator): Check verification codes with this OTP Code Validator, verifying the 4 or 6 digit one-time password format for secure lo
- [PAN Card Validator](https://themachobird.com/validators/pan-card-validator): Verify the letter and digit pattern of an Indian PAN card number with this PAN Card Validator for tax identification use
- [Password Strength Checker](https://themachobird.com/validators/password-strength-checker): Check how strong your password is instantly in your browser. Free online password strength checker with entropy, length,
- [Phone Number Validator](https://themachobird.com/validators/phone-number-validator): Check whether a phone number looks valid and identify its format instantly in your browser. Free online phone number val
- [Port Number Validator](https://themachobird.com/validators/port-number-validator): Check whether a TCP or UDP port number is within the valid range and see its common service with this free port number v
- [Pwned Password Checker](https://themachobird.com/validators/pwned-password-checker): Check passwords with this pwned password checker, using k-anonymity to test breached password hashes without sending you
- [Semantic Version Validator](https://themachobird.com/validators/semver-validator): Check versions with this Semantic Version Validator, verifying MAJOR.MINOR.PATCH format and optional pre-release or buil
- [URL Slug Validator](https://themachobird.com/validators/slug-validator): Check whether a URL slug follows a valid lowercase pattern and find illegal characters to remove with this free slug val
- [SSN Validator](https://themachobird.com/validators/ssn-validator): Check US identity numbers with this ssn validator, verifying the 9-digit Social Security Number format and SSA issuance 
- [Passphrase Strength Validator](https://themachobird.com/validators/strong-passphrase-validator): Rate the strength of a passphrase with this Passphrase Strength Validator, estimating entropy from length, word count, a
- [Time Format Validator](https://themachobird.com/validators/time-format-validator): Check time strings with this time format validator, verifying HH:MM, HH:MM:SS, and 12-hour clock with AM or PM notation.
- [UK Postcode Validator](https://themachobird.com/validators/uk-postcode-validator): Check the official format of a UK postcode and split it into outward and inward parts with this free UK postcode validat
- [UPI ID Validator](https://themachobird.com/validators/upi-validator): Check payment identifiers with this UPI ID Validator, verifying the name@handle format used for payments and banking in 
- [URL Validator](https://themachobird.com/validators/url-validator): Check whether a URL is well-formed and parse its parts instantly in your browser. Free online URL validator — protocol, 
- [US ZIP Code Validator](https://themachobird.com/validators/us-zip-code-validator): Check US postal codes with this us zip code validator, verifying the 5-digit and 5-4 ZIP+4 format for mailing addresses.
- [UUID Validator](https://themachobird.com/validators/uuid-validator): Validate UUIDs (v1–v5, nil, namespace forms) instantly in your browser. Free online UUID validator that checks format an
- [VIN Validator](https://themachobird.com/validators/vin-validator): Validate a 17-character Vehicle Identification Number (VIN) using the standard check digit instantly in your browser. Fr
- [XML Well-Formed Validator](https://themachobird.com/validators/xml-wellformed-validator): Check XML documents with this XML Well-Formed Validator, catching unclosed tags, bad attributes, and encoding problems i
- [YouTube Video ID Validator](https://themachobird.com/validators/youtube-video-id-validator): Check video links with this youtube video id validator, verifying the 11-character identifier from YouTube URLs and raw 

### Text Tools (/text) — 50 tools
- [Add Line Breaks](https://themachobird.com/text/add-line-breaks): Add line breaks between words, sentences, or paragraphs with a configurable width using this free add line breaks tool f
- [Alternating Case (aLtErNaTiNg)](https://themachobird.com/text/alternating-case): Convert to alternating case instantly.
- [Text Case Converter](https://themachobird.com/text/case-converter): Convert any text to uppercase, lowercase, title case, sentence case, camelCase, snake_case and more instantly in your br
- [Center Text](https://themachobird.com/text/center-text): Center text inside a fixed width by padding spaces with this free center text tool for monospace, terminals, and emails.
- [Character Counter](https://themachobird.com/text/character-counter): Count characters, words, sentences, and lines in any text instantly in your browser. Free online character counter with 
- [Count Word Occurrences](https://themachobird.com/text/count-occurrences): Use this Count Word Occurrences tool to count any specific word, number, or phrase across your document, with case optio
- [Emojis Remover](https://themachobird.com/text/emojis-remover): Remove emojis from any text instantly with this free emojis remover, offering delete, space, or label replacement modes 
- [Extract Email Addresses](https://themachobird.com/text/extract-emails): Use this free Extract Email Addresses tool to pull every email address out of any text, with deduplication and lowercase
- [Extract Hashtags](https://themachobird.com/text/extract-hashtags): Extract hashtags from text instantly with a unique toggle and copy support using this free extract hashtags tool for cap
- [Extract @Mentions](https://themachobird.com/text/extract-mentions): Use this free Extract @Mentions tool to grab every @username handle from any text block for social media audits and copy
- [Extract Numbers from Text](https://themachobird.com/text/extract-numbers): Use this free extract numbers from text tool to pull every integer and decimal out of your text, with count and sum tota
- [Extract URLs from Text](https://themachobird.com/text/extract-urls): Use this free extract urls tool to pull every URL out of any text, output in full or reduced to domains and paths, with 
- [Fancy Text Generator](https://themachobird.com/text/fancy-text-generator): Generate stylish Unicode fonts instantly with this free fancy text generator, offering bold, italic, script, and monospa
- [Find and Replace Text](https://themachobird.com/text/find-replace-text): Find and replace text globally across a whole document with this free find and replace text tool for bulk edits and cont
- [Invisible Text Generator](https://themachobird.com/text/invisible-text-generator): Create invisible text from Unicode blank characters that some apps hide, with this free invisible text generator for pro
- [Leetspeak Converter](https://themachobird.com/text/leetspeak-converter): Convert text into leetspeak with numeral and symbol substitutions using this free leetspeak converter for usernames and 
- [Letter Counter](https://themachobird.com/text/letter-counter): Count every letter, character, word, and line in your text with this free letter counter tool for essays, captions, and 
- [Line Diff Compare](https://themachobird.com/text/line-diff): Compare two blocks of text line by line and highlight added, removed, and changed lines instantly in your browser. Free 
- [Line Length Checker](https://themachobird.com/text/line-length-checker): Use this free line length checker to instantly measure max, average, and over-limit line lengths in any text you paste, 
- [Line Numberer](https://themachobird.com/text/line-numberer): Add line numbers to any block of text instantly in your browser. Free online line numberer — useful for code, logs, and 
- [List to Comma Separator](https://themachobird.com/text/list-to-comma): Convert a vertical list into a comma-separated string instantly with this free list to comma tool, joining with commas, 
- [Lorem Ipsum Generator](https://themachobird.com/text/lorem-ipsum): Generate lorem ipsum placeholder text instantly with this free lorem ipsum generator, choosing paragraphs, sentences, or
- [Pad Text with Characters](https://themachobird.com/text/pad-text): Pad text to a fixed width instantly with left, right, and center alignment and a custom fill character using this free p
- [Palindrome Checker](https://themachobird.com/text/palindrome-checker): Check if any word or phrase reads the same backwards instantly in your browser. Free online palindrome checker with igno
- [Pig Latin Translator](https://themachobird.com/text/pig-latin-translator): Translate English to Pig Latin instantly. Free Pig Latin translator with proper qu-clusters, capitalization and punctuat
- [Random Case Generator](https://themachobird.com/text/random-case): Randomize the case of every letter for playful posts using this free random case generator, alternating upper and lower.
- [Random Word Generator](https://themachobird.com/text/random-word-generator): Generate random English words instantly with this free random word generator, picking nouns, verbs, and adjectives for p
- [Remove Duplicate Lines](https://themachobird.com/text/remove-duplicate-lines): Remove duplicate lines from any text instantly in your browser. Free online duplicate line remover with optional sort an
- [Remove Duplicate Words](https://themachobird.com/text/remove-duplicate-words): This free remove duplicate words tool strips every repeated word from any text, keeping order and spacing, with case opt
- [Remove Extra Spaces](https://themachobird.com/text/remove-extra-spaces): Use this free remove extra spaces tool to collapse multiple spaces, trim lines, and clean whitespace from any text insta
- [Remove HTML Tags](https://themachobird.com/text/remove-html-tags): Use this free remove html tags tool to strip all markup and get plain text in your browser, with links, images, and enti
- [Remove Punctuation](https://themachobird.com/text/remove-punctuation): Remove punctuation such as commas, periods, and quotes from your text with this free remove punctuation tool for clean p
- [Reverse Text](https://themachobird.com/text/reverse-text): Reverse text, words, and lines instantly in your browser. Free online text reverser with full reversal, word-order, and 
- [Sentence Case Converter](https://themachobird.com/text/sentence-case-converter): Convert any text to sentence case instantly with this free sentence case converter, capitalizing the first letter of eac
- [Sort Lines Online](https://themachobird.com/text/sort-lines): Sort lines alphabetically or numerically, ascending or descending, instantly in your browser. Free online line sorter wi
- [Stop Word Remover](https://themachobird.com/text/stop-word-remover): Remove common stop words (the, and, of, etc.) from any text instantly in your browser. Free online stop word remover for
- [Remove Accents / Diacritics](https://themachobird.com/text/strip-accents): Strip accents from text instantly. Free diacritics remover via Unicode NFD — café → cafe.
- [Syllable Counter](https://themachobird.com/text/syllable-counter): Count syllables in any text instantly. Free syllable counter with per-word breakdown, totals and averages for poetry and
- [Tabs to Spaces](https://themachobird.com/text/tabs-to-spaces): Convert tabs to spaces or spaces to tabs at any width location with this free tabs to spaces converter for clean, consis
- [Text Repeater](https://themachobird.com/text/text-repeater): Repeat text any number of times with optional separators and line breaks using this free text repeater tool for signatur
- [Text Summarizer](https://themachobird.com/text/text-summarizer): Summarize long text instantly with this free text summarizer, picking the most representative sentences without AI or up
- [Text to Slug Converter](https://themachobird.com/text/text-to-slug): Use this free text to slug converter to turn any text into a clean lowercase, URL-friendly, SEO-ready slug instantly in 
- [Text to Speech](https://themachobird.com/text/text-to-speech): Hear any text read aloud instantly. Free text to speech with rate and pitch control using your device voices — nothing u
- [Title Case Converter](https://themachobird.com/text/title-case-converter): Convert text to title case instantly in your browser. Free online title case converter with smart handling of small word
- [Truncate Text](https://themachobird.com/text/truncate-text): Truncate text to length instantly. Free tool with ellipsis and word-boundary options.
- [Upside Down Text Generator](https://themachobird.com/text/upside-down-text): Turn your text upside down using Unicode characters that flip letters with this free upside down text generator for play
- [Word Counter](https://themachobird.com/text/word-counter): Count words, characters, sentences and paragraphs instantly as you type. Free online word counter with reading time, top
- [Word Frequency Counter](https://themachobird.com/text/word-frequency): Count how often each word appears in any text instantly in your browser. Free online word frequency counter with sorting
- [Word Scrambler / Shuffler](https://themachobird.com/text/word-scrambler): Shuffle the words in any sentence or list instantly in your browser. Free online word scrambler — mix words, make anagra
- [Zalgo Text Generator](https://themachobird.com/text/zalgo-text): Transform text into zalgo glitch text with adjustable intensity using this free zalgo text generator for memes and creep

### Business Tools (/business) — 57 tools
- [Agency Pricing Calculator](https://themachobird.com/business/agency-pricing-calculator): Price your agency project using hourly, retainer, or project-based methods with this free agency pricing calculator show
- [ARR Calculator (Annual Recurring Revenue)](https://themachobird.com/business/arr-calculator): Calculate your Annual Recurring Revenue from monthly subscriptions and plan counts with this free ARR calculator for Saa
- [Balance Sheet Generator](https://themachobird.com/business/balance-sheet-generator): Use this free balance sheet generator to build a clean statement from your assets, liabilities, and equity numbers in se
- [Break-Even Calculator](https://themachobird.com/business/break-even-calculator): Use this free Break-Even Calculator to find how many units you must sell to cover fixed and variable costs and reach bre
- [Budget Planner](https://themachobird.com/business/budget-planner): Plan a monthly budget instantly. Free online budget planner with housing, food, transport, savings split and 50/30/20 co
- [Burn Rate Calculator](https://themachobird.com/business/burn-rate-calculator): Find your startup\
- [Business Card Generator](https://themachobird.com/business/business-card-generator): Use this free business card generator to format name, title, company, phone, and email into card text you can copy to a 
- [Customer Acquisition Cost (CAC) Calculator](https://themachobird.com/business/cac-calculator): Use this Customer Acquisition Cost (CAC) Calculator to divide marketing and sales spend by new customers and see cost pe
- [Cash Flow Calculator](https://themachobird.com/business/cash-flow-calculator): Use this free cash flow calculator to compute net cash flow from your inflows and outflows and see the cash position for
- [Churn Rate Calculator](https://themachobird.com/business/churn-rate-calculator): Calculate your monthly or yearly customer churn from lost customers and totals, and see retention impact with this free 
- [Sales Commission Calculator](https://themachobird.com/business/commission-calculator): Calculate sales commissions from fixed, tiered, or performance-based plans with this free commission calculator for reps
- [Compound Interest Calculator](https://themachobird.com/business/compound-interest-calculator): Calculate investment growth year by year with this free compound interest calculator, showing principal, interest, and t
- [Credit Note Generator](https://themachobird.com/business/credit-note-generator): Create a professional credit note for refunds or invoice corrections with tax and totals using this free credit note gen
- [CSAT Calculator (Customer Satisfaction)](https://themachobird.com/business/csat-calculator): Turn positive survey responses into a percentage with this free CSAT calculator to track customer satisfaction scores ov
- [Debit Note Generator](https://themachobird.com/business/debit-note-generator): Create a professional debit note for extra charges and price corrections with full tax and totals using this free debit 
- [Delivery Challan Generator](https://themachobird.com/business/delivery-challan-generator): Issue a delivery challan for goods dispatch with supplier, receiver, and itemized details using this free delivery chall
- [Discount Calculator](https://themachobird.com/business/discount-calculator): Calculate the discounted price, amount saved, and discount percentage instantly in your browser. Free online sale and di
- [Days Sales Outstanding (DSO) Calculator](https://themachobird.com/business/dso-calculator): Use this Days Sales Outstanding (DSO) Calculator to find how many days customers take to pay from receivables and credit
- [Employee Cost (CTC) Calculator](https://themachobird.com/business/employee-cost-calculator): Use this Employee Cost (CTC) Calculator to reveal the total cost to company including benefits, taxes, insurance, and pa
- [Employee Turnover Rate Calculator](https://themachobird.com/business/employee-turnover-calculator): Calculate how many team members you lose each year with this free employee turnover rate calculator from headcount numbe
- [Estimate Generator](https://themachobird.com/business/estimate-generator): Draft a professional cost estimate with line items, taxes, and totals, ready to print or send, using this free estimate 
- [Expense Tracker (Monthly)](https://themachobird.com/business/expense-tracker): Use this free expense tracker to sum monthly categories, find the biggest spend, and review exactly where your money goe
- [Freelance Hourly Rate Calculator](https://themachobird.com/business/freelance-rate-calculator): Use this Freelance Hourly Rate Calculator to set your rate from desired salary, annual business expenses, and billable h
- [Gross Burn Rate Calculator](https://themachobird.com/business/gross-burn-calculator): Use this Gross Burn Rate Calculator to find total monthly operating spend and its annual equivalent for runway planning.
- [Gross Profit Margin Calculator](https://themachobird.com/business/gross-profit-margin): Calculate gross profit margin from revenue and COGS instantly in your browser. Free online gross margin calculator for y
- [Inventory Turnover Calculator](https://themachobird.com/business/inventory-turnover-calculator): Measure how fast stock sells using COGS and average inventory with this free inventory turnover calculator, including da
- [Invoice Generator](https://themachobird.com/business/invoice-generator): Generate a professional invoice instantly. Free online invoice generator with line items, tax, totals and payment terms.
- [Loan Payment Calculator](https://themachobird.com/business/loan-payment-calculator): Calculate monthly loan payments instantly in your browser. Free online loan payment calculator for amount, rate, term, a
- [Customer Lifetime Value (LTV) Calculator](https://themachobird.com/business/ltv-calculator): Use this Customer Lifetime Value (LTV) Calculator to estimate the revenue each customer brings from ARPU and monthly chu
- [Market Share Calculator](https://themachobird.com/business/market-share-calculator): Find your share by dividing company sales by total market sales, by units or revenue, with this free market share calcul
- [Markup Calculator](https://themachobird.com/business/markup-calculator): Calculate selling price, markup percentage, or cost from any two figures instantly in your browser. Free online business
- [MRR Calculator (Monthly Recurring Revenue)](https://themachobird.com/business/mrr-calculator): Use this free MRR calculator to compute monthly recurring revenue from your paying customers and average revenue per use
- [Net Profit Margin](https://themachobird.com/business/net-profit-margin): Calculate net profit margin instantly in your browser. Free online net margin calculator for revenue, expenses, taxes, a
- [Net Promoter Score (NPS) Calculator](https://themachobird.com/business/nps-calculator): Use this Net Promoter Score (NPS) Calculator to turn promoter, passive, and detractor counts into a loyalty score from -
- [Overhead Rate Calculator](https://themachobird.com/business/overhead-rate-calculator): Divide indirect costs by direct costs or labor hours using this free overhead rate calculator to understand your true ma
- [Privacy Policy Generator](https://themachobird.com/business/privacy-policy-generator): Generate a website privacy policy instantly. Free online privacy policy generator covering data collection, cookies, ana
- [Profit Goal Calculator (Units to Sell)](https://themachobird.com/business/profit-goal-calculator): Use this profit goal calculator to find the units you must sell to hit a target profit from fixed costs and contribution
- [Profit & Loss Statement Generator](https://themachobird.com/business/profit-loss-statement): Use this Profit & Loss Statement Generator to produce a clean P&L from revenue, COGS, and operating expenses with gross 
- [Profit Margin Calculator](https://themachobird.com/business/profit-margin-calculator): Calculate profit margin, markup, gross profit and cost/selling prices instantly. Free online business profit margin calc
- [Proforma Invoice Generator](https://themachobird.com/business/proforma-invoice-generator): Use this free proforma invoice generator to draft a proforma with seller, buyer, item quantity, unit price, and a not-a-
- [Project Timeline Generator](https://themachobird.com/business/project-timeline-generator): Use this free project timeline generator to create evenly spaced milestone dates from a start date, duration, and phase 
- [Purchase Order Generator](https://themachobird.com/business/purchase-order-generator): Create a professional purchase order with itemized lines, quantities, taxes, and totals using this free purchase order g
- [Quotation Generator](https://themachobird.com/business/quotation-generator): Use this free quotation generator to draft a professional quote with line items, quantity, unit price, tax, and validity
- [Receipt Generator](https://themachobird.com/business/receipt-generator): Generate a payment receipt instantly. Free online receipt generator with payer, amount, method, date and receipt number.
- [Customer Retention Rate Calculator](https://themachobird.com/business/retention-rate-calculator): Calculate your customer retention rate as the percentage who stay, computed from your counts with this free retention ra
- [ROI Calculator](https://themachobird.com/business/roi-calculator): Calculate return on investment (ROI) instantly in your browser. Free online ROI calculator with annualized return for ma
- [Runway Calculator](https://themachobird.com/business/runway-calculator): See how many months your startup cash lasts using balance and monthly burn with this free runway calculator, including t
- [Salary Hourly Calculator](https://themachobird.com/business/salary-hourly-calculator): Use this Salary Hourly Calculator to convert between annual salary, hourly wage, weekly, bi-weekly, monthly, and daily p
- [Salary Slip Generator](https://themachobird.com/business/salary-slip-generator): Generate a professional salary slip or pay stub with earnings, deductions, and net pay using this free salary slip gener
- [Sale Price Calculator](https://themachobird.com/business/sale-price-calculator): Get the final sale price after any discount percentage and see the amount you save with this free sale price calculator.
- [Sales Forecast Calculator](https://themachobird.com/business/sales-forecast-calculator): Use this sales forecast calculator to project sales from current monthly sales, a monthly growth rate, and a forecast ho
- [Sales Tax Calculator](https://themachobird.com/business/sales-tax-calculator): Add sales tax to any price or find the pre-tax price from a total instantly in your browser. Free online sales tax calcu
- [Startup Valuation (Revenue Multiple)](https://themachobird.com/business/startup-valuation-calculator): Estimate your startup valuation using revenue multiples and growth stage benchmarks with this free startup valuation cal
- [Terms & Conditions Generator](https://themachobird.com/business/terms-conditions-generator): Use this Terms & Conditions Generator to draft website terms covering acceptance, IP, user conduct, liability, and gover
- [Tip Calculator](https://themachobird.com/business/tip-calculator): Calculate the tip for any bill and split it per person instantly in your browser. Free online tip calculator with custom
- [VAT Calculator](https://themachobird.com/business/vat-calculator): Add or remove VAT/GST from any amount instantly in your browser. Free online VAT calculator — work out tax-inclusive and
- [Working Capital Calculator](https://themachobird.com/business/working-capital-calculator): Use this working capital calculator to subtract current liabilities from current assets and check liquidity with the cur

### Date & Time Tools (/date-time) — 51 tools
- [Add Days to Date Calculator](https://themachobird.com/date-time/add-days-to-date): Add or subtract days and weeks to any date and see the resulting date and weekday with this free add days to date calcul
- [Add Months to Date Calculator](https://themachobird.com/date-time/add-months-to-date): Add or subtract months from any date and see the resulting date, with year rollover handled automatically, using this fr
- [Add Years to Date Calculator](https://themachobird.com/date-time/add-years-to-date): Add or subtract years to any date and see the resulting date, including leap-day handling, with this free add years to d
- [Age Calculator](https://themachobird.com/date-time/age-calculator): Calculate your exact age in years, months, days, weeks, and hours instantly in your browser. Free online age calculator 
- [Age Difference Calculator](https://themachobird.com/date-time/age-difference): Calculate the exact age difference between two dates in years, months, and days with this free age difference calculator
- [Age in Months Calculator](https://themachobird.com/date-time/age-in-months-calculator): Calculate your exact age in months and days instantly with this free age in months calculator, built for infants and mil
- [Age in Weeks](https://themachobird.com/date-time/age-in-weeks): Calculate age in weeks instantly. Free weeks-old calculator for babies and milestones.
- [Anniversary Calculator](https://themachobird.com/date-time/anniversary-calculator): Use this free anniversary calculator to find your next anniversary date, years together, and the weekday, calculated ins
- [Business Days Calculator](https://themachobird.com/date-time/business-days): Use this free business days calculator to count working days between two dates, excluding weekends, with optional added 
- [Business Hours Calculator](https://themachobird.com/date-time/business-hours-calculator): Use this free business hours calculator to count working hours between two dates, excluding weekends, with your own work
- [Calendar Quarter Calculator](https://themachobird.com/date-time/calendar-quarter-calculator): Find the fiscal quarter and dates for a date instantly. Free quarter calculator.
- [Chinese Zodiac Calculator](https://themachobird.com/date-time/chinese-zodiac-calculator): Use this free Chinese zodiac calculator to find your birth year animal and element from the traditional 12-year and 10-y
- [Countdown Calculator](https://themachobird.com/date-time/countdown-calculator): Count down to any date and time or measure time elapsed since. Free online countdown calculator with days, hours, minute
- [Date Difference (Weeks & Hours)](https://themachobird.com/date-time/date-difference-weeks-hours): Use this Date Difference (Weeks & Hours) calculator to express the span between two dates in weeks, days, and total hour
- [Date Difference Calculator](https://themachobird.com/date-time/date-difference): Calculate the exact number of days, weeks, months and years between two dates instantly in your browser. Free online dat
- [Date Fraction Calculator](https://themachobird.com/date-time/date-fraction-calculator): Use this free date fraction calculator to convert any calendar date into a decimal year fraction for scientific and fina
- [Date Range List Generator](https://themachobird.com/date-time/date-range-list-generator): Use this free Date Range List Generator to create a chronological list of dates between a start and end date with a cust
- [Date to Filename](https://themachobird.com/date-time/date-to-filename): Convert any date or timestamp to filename-safe formats like YYYY-MM-DD-HHMM instantly with this free date to filename co
- [Date to Timestamp](https://themachobird.com/date-time/date-to-timestamp): Convert any date and time to a Unix timestamp in seconds or milliseconds, then back again, using this free date to times
- [What Day of the Week](https://themachobird.com/date-time/day-of-week): Find out what day of the week any date falls on, instantly in your browser. Free online weekday finder — for any date in
- [Day of Year & Percent](https://themachobird.com/date-time/day-of-year-percent): Use this Day of Year & Percent calculator to find the day number and percentage through the year for any date, leap-awar
- [Day of Year Calculator](https://themachobird.com/date-time/day-of-year): Calculate the day of year for any date, with days remaining and annual progress, using this free day of year calculator.
- [Days in Month Calculator](https://themachobird.com/date-time/days-in-month): Use this free days in month calculator to find the number of days in any month and year, including leap-year February, p
- [Days in Year Calculator](https://themachobird.com/date-time/days-in-year): Find out how many days in year any given year has, 365 or 366 for leap years, using this free days in year calculator an
- [Days Until Calculator](https://themachobird.com/date-time/days-until-calculator): Use this free days until calculator to count the days, weeks, and time remaining between two dates or until any target d
- [Duplicate Date Finder](https://themachobird.com/date-time/duplicate-date-finder): Paste a date list and immediately see every duplicate date and how many times it appears with this free duplicate date f
- [Easter Date Calculator](https://themachobird.com/date-time/easter-date-calculator): Find the exact Easter date and Easter Sunday weekday for any year between 1876 and 2299 with this free Easter date calcu
- [First Day of Month Calculator](https://themachobird.com/date-time/first-day-of-month): Use this free first day of month calculator to find the first calendar day and its weekday for any month and year, insta
- [Hours Between Times](https://themachobird.com/date-time/hours-between-times): Calculate hours between two times instantly. Free hours calculator for shifts and travel.
- [ISO Date Validator](https://themachobird.com/date-time/iso-date-validator): Use this free ISO Date Validator to check whether a string strictly matches ISO 8601 format and represents a real calend
- [Julian to Gregorian Converter](https://themachobird.com/date-time/julian-gregorian-converter): Use this free Julian to Gregorian Converter to convert dates between the Julian and Gregorian calendars instantly in you
- [Last Day of Month Calculator](https://themachobird.com/date-time/last-day-of-month): Find the actual last day of any month and year, including the weekday and leap-year February handling, with this free la
- [Leap Year Checker](https://themachobird.com/date-time/leap-year-checker): Check whether any year is a leap year with this free leap year checker, using the standard Gregorian rule for any year, 
- [Month Calendar Generator](https://themachobird.com/date-time/month-calendar-generator): Generate a printable calendar grid for any month and year with correct weekday alignment using this free month calendar 
- [Months Between Dates](https://themachobird.com/date-time/months-between-dates): Count the exact months between dates with this free months between dates calculator, showing whole months, days, and dir
- [Percentage of Year Elapsed](https://themachobird.com/date-time/percentage-of-year-elapsed): See what percentage of year elapsed for any date, with days elapsed and remaining, using this free percentage of year el
- [Seconds to Hours (H:M:S)](https://themachobird.com/date-time/seconds-to-hours): Convert seconds into hours, minutes, and seconds instantly in your browser. Free online seconds to hours-minutes-seconds
- [Sleep Schedule Calculator](https://themachobird.com/date-time/sleep-schedule-calculator): Use this Sleep Schedule Calculator to find the ideal bedtimes and wake times aligned to natural 90-minute sleep cycles f
- [Time Until Calculator](https://themachobird.com/date-time/time-until-calculator): Use this free time until calculator to find the exact time remaining, in days, hours, minutes, and seconds, until a futu
- [Time Zone Converter](https://themachobird.com/date-time/time-zone-converter): Convert a time to any time zone instantly in your browser. Free online time zone converter with offset, UTC, and local c
- [Timezone Offset Calculator](https://themachobird.com/date-time/timezone-offset-calculator): Use this free timezone offset calculator to convert a time between any two UTC offsets, ideal for meetings and travel pl
- [Unix Timestamp Converter](https://themachobird.com/date-time/unix-timestamp): Convert Unix timestamps to human-readable dates and back using this free unix timestamp converter, supporting seconds an
- [US Daylight Saving Dates](https://themachobird.com/date-time/us-daylight-saving-dates): Find US daylight saving dates for any year, including start and end dates, with this free daylight saving dates calculat
- [Week Number Calculator](https://themachobird.com/date-time/week-number): Find the ISO week number and calendar week of any date instantly in your browser. Free online week number calculator wit
- [Weekend Date Checker](https://themachobird.com/date-time/weekend-date-checker): Use this free Weekend Date Checker to instantly see whether any date falls on a Saturday or Sunday, right in your browse
- [Weeks Between Dates](https://themachobird.com/date-time/weeks-between-dates): Count the exact number of weeks between dates, plus leftover days and months, with this free weeks between dates calcula
- [Weeks Until Date](https://themachobird.com/date-time/weeks-until-date): Use this free weeks until date calculator to find out exactly how many weeks and days remain until any future target dat
- [Add Workdays to Date](https://themachobird.com/date-time/workdays-add-calculator): Use this free add workdays calculator to add a number of business days to a date, skipping weekends, for delivery and de
- [Workdays Between Dates](https://themachobird.com/date-time/workdays-between-dates): Count the workdays between dates, Monday to Friday, with this free workdays between dates calculator for payroll and pro
- [Workdays in Month](https://themachobird.com/date-time/workdays-in-month): Count how many working days any month has, excluding weekends and the holidays you select, with this free workdays in mo
- [Zodiac Sign Finder](https://themachobird.com/date-time/zodiac-sign-finder): Use this free zodiac sign finder to discover your Western zodiac sign from any birth date, quickly and accurately online

### Developer Tools (/developer) — 51 tools
- [ASCII / Unicode Character Lookup](https://themachobird.com/developer/ascii-table-lookup): Use this free online ASCII / Unicode Character Lookup to see decimal, hex, binary, and HTML entity values for any charac
- [Number Base Converter](https://themachobird.com/developer/base-converter): Convert numbers between binary, octal, decimal, and hexadecimal instantly in your browser. Free online base converter wi
- [Base64 Decoder](https://themachobird.com/developer/base64-decoder): Decode Base64 strings back to readable text instantly in your browser. Free online Base64 decoder with UTF-8 support — y
- [Base64 Encoder](https://themachobird.com/developer/base64-encoder): Encode any text or string to Base64 instantly in your browser. Free online Base64 encoder with UTF-8 support, no data ev
- [Binary to Text Converter](https://themachobird.com/developer/binary-to-text): Convert binary code (0s and 1s) back into readable text instantly in your browser. Free online binary to text decoder — 
- [Bitwise Calculator](https://themachobird.com/developer/bitwise-calculator): Compute AND, OR, XOR, NOT and bit shifts instantly. Free online bitwise calculator with decimal, 32-bit binary and hex o
- [Caesar Cipher Encoder/Decoder](https://themachobird.com/developer/caesar-cipher): Encode or decode with the Caesar cipher for any shift value instantly in your browser. Free online Caesar cipher tool wi
- [Camel Case Converter](https://themachobird.com/developer/camel-case-converter): Convert any text to camelCase, PascalCase, snake_case, or kebab-case with this free camel case converter for developers,
- [Chmod Calculator](https://themachobird.com/developer/chmod-calculator): Convert Unix file permission symbols (rwx) to numeric chmod values and back instantly. Free online chmod calculator with
- [Code Difference Comparison Tool](https://themachobird.com/developer/code-difference-comparison-tool): Compare two code blocks line by line instantly. Free online code diff tool with unified +/- output and added/removed sta
- [Color Picker](https://themachobird.com/developer/color-picker): Pick colors from an image or palette. Free online color picker with HEX, RGB, HSL, HSV, CMYK output and palette generato
- [CRC32 Checksum Generator](https://themachobird.com/developer/crc32-checksum): Generate a CRC32 checksum of any text with this free online CRC32 Checksum Generator that runs instantly in your browser
- [Cron Expression Explainer](https://themachobird.com/developer/cron-explainer): Decode cron expressions into plain English with this free online Cron Expression Explainer that validates fields, steps,
- [CSS Minifier](https://themachobird.com/developer/css-minifier): Minify CSS instantly in your browser. Free CSS minifier removing comments and whitespace, shortening hex colors, with si
- [CSV to JSON Converter](https://themachobird.com/developer/csv-to-json): Convert CSV with or without headers into JSON instantly in your browser. Free online CSV to JSON converter with delimite
- [Data Size Converter (Bytes to GB)](https://themachobird.com/developer/data-size-converter): Convert bytes, KB, MB, and GB with both binary (1024) and decimal (1000) units instantly in your browser. Free online da
- [Email Privacy Encoder](https://themachobird.com/developer/email-privacy): Hide email addresses from spam bots with this free online Email Privacy Encoder using HTML entities, JavaScript, and rev
- [Hex Decoder (Hexadecimal to Text)](https://themachobird.com/developer/hex-decoder): Convert hexadecimal bytes back to readable text instantly in your browser. Free online hex decoder with UTF-8 support — 
- [Hex Encoder (Text to Hexadecimal)](https://themachobird.com/developer/hex-encoder): Convert text to hexadecimal bytes instantly in your browser. Free online hex encoder with UTF-8 support and optional 0x 
- [HTML Entity Decoder](https://themachobird.com/developer/html-entity-decoder): Decode HTML entities (&lt; &amp; &#39; …) back to readable characters instantly in your browser. Free online HTML entity
- [HTML Entity Encoder](https://themachobird.com/developer/html-entity-encoder): Encode special characters as HTML entities (&lt;, &amp;, &quot; …) instantly in your browser. Free online HTML entity en
- [HTML Formatter](https://themachobird.com/developer/html-formatter): Format and beautify HTML instantly in your browser. Free online HTML formatter with configurable indentation — no data u
- [HTML Minifier](https://themachobird.com/developer/html-minifier): Minify HTML instantly in your browser. Free HTML minifier removing comments and whitespace while protecting pre, script 
- [HTML to Markdown Converter](https://themachobird.com/developer/html-to-markdown): Convert HTML to clean Markdown instantly in your browser. Free online HTML to Markdown converter handling headings, list
- [JavaScript Syntax Validator](https://themachobird.com/developer/js-syntax-validator): Check JavaScript syntax instantly with this free online JavaScript Syntax Validator that uses the engine parser and neve
- [JSON Diff Checker](https://themachobird.com/developer/json-diff): Compare two JSON documents key by key instantly. Free JSON diff with added/removed/changed paths, array index diffs and 
- [JSON Formatter](https://themachobird.com/developer/json-formatter): Format, beautify and validate JSON instantly in your browser. Free online JSON formatter with pretty-printing, indentati
- [JSON Minifier](https://themachobird.com/developer/json-minifier): Minify JSON to remove all whitespace and shrink it for faster transfer. Free online JSON minifier with size savings — pr
- [JSON to CSV Converter](https://themachobird.com/developer/json-to-csv): Convert a JSON array of objects into CSV instantly in your browser. Free online JSON to CSV converter with automatic hea
- [JSON to XML Converter](https://themachobird.com/developer/json-to-xml): Convert JSON data into XML instantly in your browser. Free online JSON to XML converter with root-element control — no u
- [JSON Validator](https://themachobird.com/developer/json-validator): Validate JSON syntax instantly in your browser and get a clear pass/fail result with the exact error. Free online JSON v
- [JWT Decoder](https://themachobird.com/developer/jwt-decoder): Decode JSON Web Tokens instantly in your browser. Free JWT decoder with header, payload, expiry check and signature pres
- [Markdown to HTML Converter](https://themachobird.com/developer/markdown-to-html): Convert Markdown to clean, valid HTML instantly in your browser. Free online Markdown to HTML converter for headings, li
- [Morse Code Translator](https://themachobird.com/developer/morse-code): Translate text to Morse code and Morse code back to text instantly in your browser. Free online morse code translator — 
- [Object to JSON Converter](https://themachobird.com/developer/object-to-json): Format and validate JSON or a JS object to JSON instantly in your browser with this free online object to json converter
- [Online MD5 Generator](https://themachobird.com/developer/online-md5-generator): Generate MD5 hashes instantly in your browser. Free online MD5 generator with uppercase option — checksums for files, st
- [Password Encryption Utility](https://themachobird.com/developer/password-encryption-utility): Encrypt text with a password using AES-256-GCM in your browser with this password encryption utility, and decrypt with t
- [Query Parameter Builder](https://themachobird.com/developer/query-parameter-builder): Build a clean, URL-encoded query string from key-value pairs instantly in your browser. Free online query parameter buil
- [Regex Escape Tool](https://themachobird.com/developer/regex-escape): Escape all regex metacharacters in your input instantly in your browser. Free online regex escape tool for building lite
- [Regex Tester](https://themachobird.com/developer/regex-tester): Test regular expressions against text instantly in your browser with match highlighting and a flags menu. Free online re
- [ROT13 Converter](https://themachobird.com/developer/rot13): Encode or decode ROT13 instantly in your browser. Free online ROT13 encoder/decoder for obfuscating text on forums and p
- [Semantic Version Comparator](https://themachobird.com/developer/semver-comparator): Compare two semantic version numbers with this free online Semantic Version Comparator for major.minor.patch dependencie
- [SHA-256 Generator](https://themachobird.com/developer/sha256-generator): Generate SHA-256 hashes instantly with WebCrypto. Free online SHA-256 generator for checksums, Git-style IDs and integri
- [SQL Formatter](https://themachobird.com/developer/sql-formatter): Format and beautify SQL queries instantly in your browser. Free online SQL formatter that adds indentation for readable 
- [SQL Minifier](https://themachobird.com/developer/sql-minifier): Remove extra whitespace and newlines from SQL instantly in your browser. Free online SQL minifier to compress queries to
- [Text to Binary Converter](https://themachobird.com/developer/text-to-binary): Convert text to binary code (0s and 1s) instantly in your browser. Free online text to binary encoder with UTF-8 support
- [URL Decoder](https://themachobird.com/developer/url-decoder): Decode percent-encoded URL strings back to readable text instantly in your browser. Free online URL decoder for query st
- [URL Encoder](https://themachobird.com/developer/url-encoder): URL-encode any text or string instantly in your browser. Free online URL encoder / percent-encoder for query strings, pa
- [URL Parameter Parser](https://themachobird.com/developer/url-parameter-parser): Parse any URL and decode its query string parameters instantly in your browser. Free online URL parameter parser \u2014 
- [What Is My Browser](https://themachobird.com/developer/what-is-my-browser): See your browser, version, OS, screen, and language instantly with this free what is my browser detector, built for trou
- [XML Formatter](https://themachobird.com/developer/xml-formatter): Format, beautify and validate XML/HTML instantly in your browser. Free online XML formatter with indentation control \u2

### SEO Tools (/seo) — 50 tools
- [Article Schema Generator](https://themachobird.com/seo/article-schema-generator): Create Article JSON-LD schema with headline, author, and dates using this free article schema generator for rich results
- [Breadcrumb Schema Generator](https://themachobird.com/seo/breadcrumb-schema-generator): Generate breadcrumb schema instantly. Free JSON-LD BreadcrumbList.
- [Broken Link Checker (HTML)](https://themachobird.com/seo/broken-link-checker): Check a webpage\
- [Canonical Tag Checker](https://themachobird.com/seo/canonical-checker): Use this Canonical Tag Checker to find whether a page declares a canonical tag and read the exact URL it points to in yo
- [Canonical Tag Generator](https://themachobird.com/seo/canonical-tag-generator): Use this free canonical tag generator to create a rel canonical link tag for any URL and consolidate your duplicate cont
- [Code to Text Ratio Checker](https://themachobird.com/seo/code-to-text-ratio-checker): Use this code to text ratio checker to measure visible text against raw HTML size instantly, with a verdict and bloat di
- [Domain Into IP](https://themachobird.com/seo/domain-into-ip): Find the IP address behind any domain instantly with this Domain Into IP lookup, showing IPv4, IPv6 and hosting clues vi
- [Event Schema Generator](https://themachobird.com/seo/event-schema-generator): Use this free event schema generator to create Event JSON-LD with name, start date, and location ready for Google rich r
- [FAQ Schema Generator (JSON-LD)](https://themachobird.com/seo/faq-schema-generator): Generate FAQPage structured data (JSON-LD) for Google rich results instantly in your browser. Free online FAQ schema gen
- [Find DNS Records](https://themachobird.com/seo/find-dns-records): Find DNS Records for any domain instantly with this free lookup covering A, AAAA, MX, TXT, NS, CNAME and SOA via DNS-ove
- [H1 Tag Extractor](https://themachobird.com/seo/h1-extractor): Use this H1 Tag Extractor to pull every H1 from your HTML instantly, with a count and the exact heading text listed for 
- [Heading Structure Analyzer](https://themachobird.com/seo/heading-analyzer): Use this Heading Structure Analyzer to extract the H1 to H6 heading structure from any HTML or pasted text and flag SEO 
- [Heading Hierarchy Validator](https://themachobird.com/seo/heading-hierarchy-validator): This Heading Hierarchy Validator checks your H1 to H6 nesting instantly, flagging skipped levels and confirming a single
- [Hreflang Tag Generator](https://themachobird.com/seo/hreflang-generator): Use this Hreflang Tag Generator to create hreflang alternate tags for every language and country version of your page fo
- [.htaccess Redirect Generator](https://themachobird.com/seo/htaccess-redirect-generator): Use this htaccess redirect generator to create Apache redirect rules for moved pages, with optional HTTPS and www canoni
- [HTML Sitemap Generator](https://themachobird.com/seo/html-sitemap-generator): Produce a clickable, nested HTML sitemap page that lists every URL with this free html sitemap generator for your site a
- [Image Alt Text Checker](https://themachobird.com/seo/image-alt-checker): Use this Image Alt Text Checker to find images missing alt text in your HTML and fix accessibility and image SEO gaps fa
- [Internal Link Counter](https://themachobird.com/seo/internal-link-counter): Count every internal link on a page and list which URLs they point to with this free internal link counter for SEO conte
- [Keyword Density Checker](https://themachobird.com/seo/keyword-density): Analyze keyword usage and density in your text instantly in your browser. Free online keyword density checker with per-w
- [Keyword Ideas Generator](https://themachobird.com/seo/keyword-ideas-generator): Use this keyword ideas generator to turn a single seed keyword into long-tail and question variations for SEO and conten
- [Link Analyzer Tool](https://themachobird.com/seo/link-analyzer-tool): Audit links in pasted HTML instantly. Free link analyzer with internal/external split, nofollow counts and broken empty-
- [Link Price Calculator](https://themachobird.com/seo/link-price-calculator): Estimate sponsored backlink prices instantly. Free link price calculator from authority, traffic, niche and placement wi
- [LocalBusiness Schema Generator](https://themachobird.com/seo/localbusiness-schema-generator): Generate LocalBusiness schema instantly. Free JSON-LD with name, address, phone.
- [Meta Description Length Checker](https://themachobird.com/seo/meta-description-length-checker): Use this meta description length checker to test any description against the ideal 140 to 160 character range and avoid 
- [Meta Robots Checker](https://themachobird.com/seo/meta-robots-checker): Check whether a page declares a meta robots directive, then read its noindex and nofollow rules with this free meta robo
- [Meta Tag Analyzer](https://themachobird.com/seo/meta-tag-analyzer): Parse the title, meta description, and key meta tags from any page HTML instantly in your browser. Free online SEO meta 
- [Meta Tag Generator](https://themachobird.com/seo/meta-tag-generator): Generate SEO meta tags instantly. Free online meta tag generator for title, description, keywords, robots and Open Graph
- [My IP Address](https://themachobird.com/seo/my-ip-address): Find your public IP, approximate location, ISP, and timezone instantly with this my ip address checker built for debuggi
- [Open Graph Checker](https://themachobird.com/seo/og-checker): Use this open graph checker to verify your og:title, og:description, og:image, og:url, and og:type tags in a single pass
- [Open Graph Generator](https://themachobird.com/seo/open-graph-generator): Generate Open Graph tags for Facebook and LinkedIn with title, description, and image controls using this free open grap
- [Product Schema Generator](https://themachobird.com/seo/product-schema-generator): Generate Product JSON-LD with price, availability, brand, and ratings using this free product schema generator for rich 
- [Readability Checker](https://themachobird.com/seo/readability-checker): Use this readability checker to compute the Flesch Reading Ease score and grade level of any text instantly in your brow
- [Review Schema Generator](https://themachobird.com/seo/review-schema-generator): Use this review schema generator to create Review JSON-LD with item name, rating, and author for rich snippet eligibilit
- [Robots.txt Tester](https://themachobird.com/seo/robots-tester): Use this Robots.txt Tester to check your Allow and Disallow rules against any URL path and see whether crawlers are bloc
- [Robots.txt Generator](https://themachobird.com/seo/robots-txt-generator): Generate a valid robots.txt file instantly. Free online robots.txt generator with user-agent rules, disallow paths, site
- [JSON-LD Schema Validator](https://themachobird.com/seo/schema-jsonld-validator): Use this JSON-LD Schema Validator to check pasted schema markup for syntax errors and confirm a schema.org context befor
- [Schema Markup Generator (JSON-LD)](https://themachobird.com/seo/schema-markup-generator): Use this Schema Markup Generator (JSON-LD) to create Article, Product, or Organization structured data for SEO right in 
- [SEO Content Brief Generator](https://themachobird.com/seo/seo-content-brief-generator): Use this seo content brief generator to turn a keyword and search intent into titles, a meta draft, H2 outline, and word
- [SEO Title Generator](https://themachobird.com/seo/seo-title-generator): Use this seo title generator to create length-checked title variations with power words for better Google click-through.
- [SEO Word Count Checker](https://themachobird.com/seo/seo-word-count): Check the word count of any page or pasted text and how it compares to common SEO page-length benchmarks with this free 
- [SERP Preview Simulator (Title & Meta)](https://themachobird.com/seo/serp-preview): Preview how your title and meta description appear in Google search results, with live character and pixel-length checks
- [SERP Snippet Preview](https://themachobird.com/seo/serp-simulator): Use this SERP Snippet Preview to see how your title and meta description appear in Google and where they may truncate be
- [Sitemap Validator](https://themachobird.com/seo/sitemap-validator): Use this sitemap validator to check your sitemap.xml instantly, counting URL entries, flagging invalid links, and confir
- [Suspicious Domain Checker](https://themachobird.com/seo/suspicious-domain-checker): Use this suspicious domain checker to score phishing-risk signals in any domain, including entropy, lookalike, TLD, and 
- [Title Length Checker](https://themachobird.com/seo/title-length-checker): Check your meta title tag length against search-engine limits instantly in your browser. Free online title length checke
- [Twitter Card Generator](https://themachobird.com/seo/twitter-card-generator): Generate Twitter Card tags from profile to summary-large-image with this free twitter card generator using your URL and 
- [Twitter Card Checker](https://themachobird.com/seo/twitter-checker): Check whether a page declares its Twitter Card tags correctly, including the image, with this free twitter card checker 
- [URL Rewriting Tool](https://themachobird.com/seo/url-rewriting-tool): Convert dynamic URLs to SEO-friendly static URLs instantly. Free URL rewriting tool generating Apache RewriteRules from 
- [URL Slug Optimizer](https://themachobird.com/seo/url-slug-optimizer): Use this URL Slug Optimizer to turn any title or phrase into a clean, lowercased, hyphen-separated slug ready for your C
- [XML Sitemap Generator](https://themachobird.com/seo/xml-sitemap-generator): Use this free xml sitemap generator to turn a URL list into a valid sitemap.xml with change frequency, priority, and las

### Image Tools (/image) — 64 tools
- [Aspect Ratio Calculator](https://themachobird.com/image/aspect-ratio-calculator): Calculate the aspect ratio and missing dimensions of any image instantly in your browser. Free online aspect ratio calcu
- [AVIF to JPG Converter](https://themachobird.com/image/avif-to-jpg): Convert AVIF to JPG instantly. Free converter — no uploads.
- [Background Remover (Simple)](https://themachobird.com/image/background-remover): Remove white background in seconds with this free simple background remover for product photos, logos, and screenshots -
- [Base64 to Image Converter](https://themachobird.com/image/base64-to-image): Decode base64 strings back into viewable images, with live preview and download, using this free base64 to image convert
- [Image Border Adder](https://themachobird.com/image/border-adder): Add borders to photos with any color, width, and style using this free Image Border Adder, then download the framed resu
- [Photo Collage Maker](https://themachobird.com/image/collage-maker): Combine 2–4 photos into a grid with this free online photo collage maker that runs instantly in your browser with cover-
- [Color Contrast / WCAG Checker](https://themachobird.com/image/color-contrast-calculator): Check the contrast ratio between two colors and WCAG AA/AAA levels with this free online Color Contrast / WCAG Checker t
- [DPI / PPI Calculator](https://themachobird.com/image/dpi-calculator): Calculate DPI / PPI and print dimensions from pixel count and physical size with this free online DPI / PPI Calculator, 
- [Dummy Image Placeholder Generator](https://themachobird.com/image/dummy-image-placeholder): Generate placeholder image data URIs with this free online Dummy Image Placeholder Generator, with custom size, colors, 
- [EXIF Data Viewer](https://themachobird.com/image/exif-data-viewer): Read EXIF metadata from JPEG photos with this free online EXIF Data Viewer, showing camera, lens, GPS, exposure, and tim
- [EXIF Remover](https://themachobird.com/image/exif-remover): Strip EXIF, GPS, and camera metadata from photos with this free exif remover that works privately in your browser with n
- [Favicon Generator](https://themachobird.com/image/favicon-generator): Generate a favicon ICO plus PNG sizes instantly in your browser with this free online favicon generator, including 16, 3
- [Flip Image Horizontally](https://themachobird.com/image/flip-image-horizontal): Flip image horizontal with one click and download the mirrored photo using this free flip image tool for photos and grap
- [Flip Image Vertically](https://themachobird.com/image/flip-image-vertical): Flip image vertical in one click and download the mirrored photo instantly using this free flip image tool for editing, 
- [HEIC to JPG Converter](https://themachobird.com/image/heic-to-jpg): Convert HEIC to JPG instantly. Free iPhone photo converter — no uploads.
- [Add Text to Image](https://themachobird.com/image/image-add-text): Add text to image files with custom fonts, colors, sizes, and positions, then download, using this free add text to imag
- [Blur Background of Image](https://themachobird.com/image/image-background-blur): Blur background in any photo automatically while keeping the main subject sharp, with this free blur background tool for
- [Image Blur Tool](https://themachobird.com/image/image-blur): Blur image pixels with an adjustable radius for redaction, backgrounds, or effects using this free online Image Blur Too
- [Image Brightness Adjuster](https://themachobird.com/image/image-brightness): Adjust brightness image levels with live preview and side-by-side compare using this free image brightness adjuster tool
- [Circle Crop Image (Avatar)](https://themachobird.com/image/image-circle-crop): Crop an image to a circle instantly in your browser with this free circle crop tool and avatar maker, with no uploads re
- [Image Compressor](https://themachobird.com/image/image-compressor): Compress JPEG, PNG, WebP images in your browser. Free online image compressor with quality slider, batch support, and no
- [Image Contrast Adjuster](https://themachobird.com/image/image-contrast): Adjust contrast instantly. Free contrast tool — no uploads.
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- [Resolution to Aspect Ratio Calculator](https://themachobird.com/image/resolution-calculator): Use the Resolution to Aspect Ratio Calculator to find the aspect ratio and megapixel count of any screen or image resolu
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### PDF Tools (/pdf) — 77 tools
- [Excel to PDF Converter](https://themachobird.com/pdf/excel-to-pdf-converter): Convert Excel (XLSX/XLS) to PDF in your browser — free online Excel to PDF converter renders tables with all rows and co
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- [Bates Numbering for PDF](https://themachobird.com/pdf/pdf-bates-numbering): Stamp Bates numbers (PREFIX-000001…) on every PDF page for legal document control — free in your browser.
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- [PDF Page Size Summary](https://themachobird.com/pdf/pdf-page-sizes-summary): Use this free pdf page size summary tool to summarize page sizes in a PDF instantly, counting pages by size, largest pag
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### Financial Calculators (/financial) — 486 tools
- [50/30/20 Budget Calculator](https://themachobird.com/financial/50-30-20-budget-calculator): Apply the 50/30/20 budgeting rule.
- [Absorption Costing Calculator](https://themachobird.com/financial/absorption-costing-calculator): Calculate product cost under absorption costing.
- [ADU Loan Calculator](https://themachobird.com/financial/accessory-dwelling-loan-calculator): Calculate accessory dwelling unit financing.
- [Accounting Rate of Return](https://themachobird.com/financial/accounting-rate-of-return-calculator): Calculate accounting rate of return.
- [Accounts Payable Calculator](https://themachobird.com/financial/accounts-payable-calculator): Calculate accounts payable turnover ratio.
- [Accounts Payable Turnover Calculator](https://themachobird.com/financial/accounts-payable-turnover-calculator): See how quickly your business pays suppliers with this Accounts Payable Turnover Calculator, which compares net credit p
- [Accounts Receivable Turnover](https://themachobird.com/financial/accounts-receivable-calculator): Calculate accounts receivable turnover ratio.
- [AR Turnover Calculator](https://themachobird.com/financial/accounts-receivable-turnover-calculator): Calculate AR turnover and days sales outstanding.
- [ABC Costing Calculator](https://themachobird.com/financial/activity-based-costing-calculator): Allocate overhead with activity-based costing.
- [Adoption Loan Calculator](https://themachobird.com/financial/adoption-loan-calculator): Calculate adoption expense financing.
- [After Tax Yield Calculator](https://themachobird.com/financial/after-tax-yield-calculator): Calculate after-tax investment yield.
- [Airbnb ROI Calculator](https://themachobird.com/financial/airbnb-roi-calculator): Short-term rental ROI analysis.
- [Airplane Loan Calculator](https://themachobird.com/financial/airplane-loan-calculator): Calculate aircraft financing.
- [Alpha-Beta Decomposition](https://themachobird.com/financial/alpha-beta-decomposition): Decompose returns into alpha and beta.
- [Stock Alpha Calculator](https://themachobird.com/financial/alpha-calculator): Calculate stock alpha (excess return).
- [Altman Z-Score Calculator](https://themachobird.com/financial/altman-z-score-calculator): Calculate bankruptcy prediction score.
- [Amortization Calculator](https://themachobird.com/financial/amortization-calculator): Get your loan\
- [Extra Payment Amortization Calculator](https://themachobird.com/financial/amortization-extra-payments-calculator): See how extra monthly payments affect your loan payoff. Compare multiple extra payment scenarios side-by-side with amort
- [Amortization Schedule Calculator](https://themachobird.com/financial/amortization-schedule-calculator): Full amortization payment schedule.
- [Annualized Return Calculator](https://themachobird.com/financial/annualized-return-calculator): Calculate annualized return from sub-periods.
- [Annuity Calculator](https://themachobird.com/financial/annuity-calculator): Calculate annuity payments plus present and future values for fixed income streams with this free annuity calculator for
- [Annuity Due Calculator](https://themachobird.com/financial/annuity-due-calculator): Calculate annuity due payments (beginning of period).
- [Annuity Payout Calculator](https://themachobird.com/financial/annuity-payout-calculator): Calculate annuity payout amounts.
- [Annuity Rate Comparison](https://themachobird.com/financial/annuity-rate-comparison-calculator): Compare annuity rates across providers.
- [Annuity vs Lump Sum](https://themachobird.com/financial/annuity-vs-lump-sum-calculator): Compare annuity payments vs lump sum.
- [APR Calculator](https://themachobird.com/financial/apr-calculator): Calculate the Annual Percentage Rate for loans including fees and total cost.
- [Adjustable Rate Mortgage Calculator](https://themachobird.com/financial/arm-calculator): Calculate ARM payment changes over time.
- [ARM Mortgage Calculator](https://themachobird.com/financial/arm-mortgage-calculator): Calculate payments for adjustable-rate mortgage.
- [Auto Insurance Discount Calculator](https://themachobird.com/financial/auto-insurance-discount-calculator): Calculate potential auto insurance discounts.
- [Auto Lease Calculator](https://themachobird.com/financial/auto-lease-calculator): Estimate monthly lease payments and total cost for leasing a vehicle.
- [Auto Loan Calculator](https://themachobird.com/financial/auto-loan-calculator): Calculate monthly payments, total interest, and amortization for an auto loan.
- [Average Return Calculator](https://themachobird.com/financial/average-return-calculator): Calculate the average annual return on an investment over a given period.
- [Backdoor Roth Calculator](https://themachobird.com/financial/backdoor-roth-calculator): Calculate backdoor Roth conversion.
- [Balloon Mortgage Calculator](https://themachobird.com/financial/balloon-mortgage-calculator): Calculate balloon mortgage payments.
- [Balloon Payment Calculator](https://themachobird.com/financial/balloon-payment-deep-calculator): Calculate balloon payment amounts.
- [Bankruptcy Probability Calculator](https://themachobird.com/financial/bankruptcy-probability-calculator): Estimate bankruptcy probability.
- [Basement Renovation Loan](https://themachobird.com/financial/basement-renovation-loan-calculator): Calculate basement renovation financing.
- [Bathroom Remodel Loan](https://themachobird.com/financial/bathroom-remodel-loan-calculator): Calculate bathroom renovation financing.
- [Benchmark Comparison](https://themachobird.com/financial/benchmark-comparison-calculator): Compare portfolio to benchmark.
- [Stock Beta Calculator](https://themachobird.com/financial/beta-calculator): Calculate stock beta against market index.
- [Biweekly Mortgage Calculator](https://themachobird.com/financial/biweekly-mortgage-calculator): Pay off mortgage faster with biweekly payments.
- [Black-Litterman Calculator](https://themachobird.com/financial/black-litterman-calculator): Calculate Black-Litterman expected returns.
- [Boat Loan Calculator](https://themachobird.com/financial/boat-loan-calculator): Calculate monthly payments for your boat loan.
- [Bond Calculator](https://themachobird.com/financial/bond-calculator): Calculate bond price, yield, coupon payments, and maturity value.
- [Bond Duration Calculator](https://themachobird.com/financial/bond-duration-calculator): Calculate Macaulay and modified duration.
- [Bond Ladder Calculator](https://themachobird.com/financial/bond-ladder-calculator): Build and analyze a bond ladder strategy.
- [Bond Price Calculator](https://themachobird.com/financial/bond-price-calculator): Calculate bond price from yield.
- [Bond Yield Calculator](https://themachobird.com/financial/bond-yield-calculator): Calculate bond current yield and YTM.
- [Bonus Depreciation Calculator](https://themachobird.com/financial/bonus-depreciation-calculator): Calculate bonus depreciation amount.
- [Book Value Per Share Calculator](https://themachobird.com/financial/book-value-per-share-calculator): Calculate book value per share.
- [Business Break-Even Analysis](https://themachobird.com/financial/break-even-deep-calculator): Calculate break-even point for your business.
- [Break Even Point Calculator](https://themachobird.com/financial/break-even-point-calculator): Calculate break-even point in units and dollars.
- [Bridge Loan Calculator](https://themachobird.com/financial/bridge-loan-calculator): Calculate bridge loan costs.
- [Retirement Bucket Strategy](https://themachobird.com/financial/bucket-strategy-calculator): Calculate retirement bucket allocation.
- [Budget Calculator](https://themachobird.com/financial/budget-calculator): Plan and track your monthly budget with income and expense categories.
- [Burn Rate Calculator (Financial Calculators)](https://themachobird.com/financial/burn-rate-calculator): Calculate startup burn rate and runway.
- [Business Interruption Calculator](https://themachobird.com/financial/business-interruption-calculator): Estimate business interruption losses.
- [Business Loan Calculator](https://themachobird.com/financial/business-loan-calculator): Calculate repayment schedules and total cost for a business loan.
- [Butterfly Spread Calculator](https://themachobird.com/financial/butterfly-spread-calculator): Analyze butterfly spread options strategy.
- [CAC to LTV Ratio Calculator](https://themachobird.com/financial/cac-ltv-calculator): Calculate Customer Acquisition Cost to Lifetime Value ratio.
- [CAGR From Values Calculator](https://themachobird.com/financial/cagr-from-values-calculator): Calculate CAGR from start and end values.
- [Callable Bond Calculator](https://themachobird.com/financial/callable-bond-calculator): Calculate callable bond value.
- [Calmar Ratio Calculator](https://themachobird.com/financial/calmar-ratio-calculator): Calculate Calmar risk-adjusted return.
- [Canadian Mortgage Calculator](https://themachobird.com/financial/canadian-mortgage-calculator): Calculate mortgage payments using Canadian mortgage compounding rules.
- [Cap Rate Calculator](https://themachobird.com/financial/cap-rate-calculator): Calculate capitalization rate for real estate.
- [Capitalization Rate Calculator](https://themachobird.com/financial/cap-rate-deep-calculator): Calculate cap rate for commercial real estate.
- [Cap Table Calculator](https://themachobird.com/financial/cap-table-calculator): Model startup cap table.
- [Capital Gains Tax Brackets Calculator](https://themachobird.com/financial/capital-gains-tax-brackets-calculator): Use this Capital Gains Tax Brackets Calculator to estimate what you might owe on investment gains and see how your tax l
- [Capital Gains Tax Calculator](https://themachobird.com/financial/capital-gains-tax-calculator): Calculate capital gains tax liability.
- [CAPM Calculator](https://themachobird.com/financial/capm-calculator): Calculate expected return using CAPM.
- [Car Affordability Calculator](https://themachobird.com/financial/car-affordability-calculator): How much car can you afford.
- [Car Amortization Calculator](https://themachobird.com/financial/car-amortization-calculator): Calculate car loan amortization schedule.
- [Carbon Tax Calculator](https://themachobird.com/financial/carbon-tax-calculator): Estimate carbon tax based on emissions.
- [Cash Back or Low Interest Calculator](https://themachobird.com/financial/cash-back-or-low-interest-calculator): Compare cash back offers versus low interest rate financing to find the better deal.
- [Cash Balance Plan Calculator](https://themachobird.com/financial/cash-balance-calculator): Calculate cash balance pension plan.
- [Cash Conversion Cycle](https://themachobird.com/financial/cash-conversion-cycle-calculator): Calculate cash conversion cycle days.
- [Business Cash Flow Calculator](https://themachobird.com/financial/cash-flow-calculator): Calculate business cash flow projections.
- [Cash on Cash Calculator](https://themachobird.com/financial/cash-on-cash-calculator): Calculate cash on cash return for investment.
- [Cash on Cash Return Calculator](https://themachobird.com/financial/cash-on-cash-return-calculator): Calculate cash on cash return.
- [Cash Ratio Calculator](https://themachobird.com/financial/cash-ratio-calculator): Calculate cash-only liquidity ratio.
- ... and 406 more in /financial/

### Math Calculators (/math) — 525 tools
- [Absolute Value Calculator](https://themachobird.com/math/absolute-value-calculator): Calculate absolute value of numbers.
- [Abundant Number Checker](https://themachobird.com/math/abundant-number-checker): Check if a number is abundant.
- [Alternating Series Test](https://themachobird.com/math/alternating-series-calculator): Test alternating series convergence.
- [Angle Between Vectors](https://themachobird.com/math/angle-between-vectors): Calculate angle between two vectors.
- [Angle Conversion Calculator](https://themachobird.com/math/angle-conversion-calculator): Convert between degrees and radians.
- [Annulus Area Calculator](https://themachobird.com/math/annulus-area): Calculate area of ring/annulus.
- [Annulus Calculator](https://themachobird.com/math/annulus-calculator): Calculate area between two concentric circles.
- [One-Way ANOVA Calculator](https://themachobird.com/math/anova-one-way): Perform one-way ANOVA.
- [Pi Approximation Calculator](https://themachobird.com/math/approximation-pi): Approximate pi using various series.
- [ARC Length Calculator](https://themachobird.com/math/arc-length-calculator): Calculate arc length from radius and angle.
- [ARC Length](https://themachobird.com/math/arc-length): Calculate arc length from radius and angle.
- [Area Calculator](https://themachobird.com/math/area-calculator): Calculate area of basic 2D shapes.
- [Area Converter Calculator](https://themachobird.com/math/area-converter-calculator): Use this free Area Converter Calculator to convert between square meters, square feet, square inches, acres, and hectare
- [Area Parallelogram from Vectors](https://themachobird.com/math/area-parallelogram-vectors): Calculate area using cross product.
- [Arithmetic Progression Calculator](https://themachobird.com/math/arithmetic-progression): Calculate arithmetic series sum and terms.
- [Average Calculator](https://themachobird.com/math/average-calculator): Calculate mean of a set of numbers.
- [Barycentric Coordinates](https://themachobird.com/math/barycentric-coordinates-calculator): Calculate barycentric coordinates.
- [Base Converter Calculator](https://themachobird.com/math/base-converter-calculator): Convert numbers between bases.
- [Basic Calculator](https://themachobird.com/math/basic-calculator): Perform basic arithmetic operations with a simple and intuitive interface.
- [Bayes Theorem Calculator](https://themachobird.com/math/bayes-theorem-calculator): Calculate conditional probability using Bayes theorem.
- [Bayes Theorem](https://themachobird.com/math/bayes-theorem): Apply Bayes theorem to update probabilities.
- [Bell Number Calculator](https://themachobird.com/math/bell-number-calculator): Calculate Bell numbers.
- [Bell Number](https://themachobird.com/math/bell-number): Calculate Bell numbers of set partitions.
- [Bernoulli Number Calculator](https://themachobird.com/math/bernoulli-number-calculator): Calculate Bernoulli numbers.
- [Beta Function Calculator](https://themachobird.com/math/beta-function): Calculate beta function values.
- [Big Number Calculator](https://themachobird.com/math/big-number-calculator): Perform arithmetic with very large numbers beyond standard precision.
- [Bill Splitter Calculator](https://themachobird.com/math/bill-splitter): Split a bill evenly among a group.
- [Binary Calculator](https://themachobird.com/math/binary-calculator): Perform binary arithmetic operations.
- [Binary Operations Calculator](https://themachobird.com/math/binary-operations): Perform bitwise operations.
- [Binomial Coefficient Calculator](https://themachobird.com/math/binomial-coefficient-calculator): Calculate binomial coefficient C(n,k).
- [Binomial Probability Calculator](https://themachobird.com/math/binomial-probability): Calculate binomial distribution probability.
- [Biot Number Calculator](https://themachobird.com/math/biot-number): Calculate Biot number for heat conduction.
- [Birthday Problem Calculator](https://themachobird.com/math/birthday-problem): Probability of shared birthday in group.
- [Bisection Method Calculator](https://themachobird.com/math/bisection-method): Find root using bisection method.
- [Bohr Model Calculator](https://themachobird.com/math/bohr-model-calculator): Calculate hydrogen energy levels using Bohr model.
- [Bohr Model](https://themachobird.com/math/bohr-model): Calculate hydrogen energy levels.
- [Bolzano-Weierstrass Calculator](https://themachobird.com/math/bolzano-weierstrass-calculator): Find convergent subsequence.
- [Box Plot Calculator](https://themachobird.com/math/box-plot-calculator): Calculate box plot statistics.
- [Boyles Law Calculator](https://themachobird.com/math/boyles-law-calculator): Calculate gas pressure-volume relationship.
- [Capacitor Charge Calculator](https://themachobird.com/math/capacitor-charge-calculator): Calculate capacitor charge from voltage and capacitance.
- [Capacitor Energy Calculator](https://themachobird.com/math/capacitor-energy-calculator): Calculate energy stored in capacitor (E=0.5CV^2).
- [Carbon Dating](https://themachobird.com/math/carbon-dating): Estimate age from carbon-14 remaining.
- [Cardinality Calculator](https://themachobird.com/math/cardinality): Calculate cardinality of set operations.
- [Catalan Number Calculator](https://themachobird.com/math/catalan-number-calculator): Calculate Catalan numbers.
- [Cauchy Product Calculator](https://themachobird.com/math/cauchy-product-calculator): Calculate Cauchy product of two sequences.
- [Cauchy Sequence Calculator](https://themachobird.com/math/cauchy-sequence-calculator): Check if sequence is Cauchy.
- [CGPA to Percentage Calculator](https://themachobird.com/math/cgpa-to-percentage-calculator): Convert CGPA to percentage instantly. Free online CGPA to percentage calculator for 10, 4 and 5 point scales with divisi
- [Chaitin Constant Approximator](https://themachobird.com/math/chaitin-constant): Approximate Chaitin omega for small programs.
- [Characteristic Polynomial](https://themachobird.com/math/characteristic-polynomial): Calculate characteristic polynomial of matrix.
- [Charles Law Calculator](https://themachobird.com/math/charles-law-calculator): Calculate gas temperature-volume relationship.
- [Checksum Calculator](https://themachobird.com/math/checksum-calculator): Calculate various checksums.
- [Chi-Square Test Calculator](https://themachobird.com/math/chi-square-test): Calculate chi-square test statistic.
- [Chinese Remainder Calculator](https://themachobird.com/math/chinese-remainder-calculator): Solve system of congruences.
- [Chinese Remainder](https://themachobird.com/math/chinese-remainder): Solve system of congruences.
- [Cholesky Decomposition](https://themachobird.com/math/cholesky-decomposition): Calculate Cholesky decomposition.
- [Circle Chord Calculator](https://themachobird.com/math/chord-calculator): Calculate chord length from radius and angle.
- [Chord Length Calculator](https://themachobird.com/math/chord-length): Calculate chord length from radius and angle.
- [Circle Calculator](https://themachobird.com/math/circle-calculator): Calculate circle properties (area, circumference).
- [Circle Equation Calculator](https://themachobird.com/math/circle-equation-calculator): Find equation of a circle from center/radius.
- [Coefficient of Variation](https://themachobird.com/math/coefficient-of-variation): Calculate coefficient of variation.
- [Collatz Conjecture Calculator](https://themachobird.com/math/collatz-conjecture): Analyze Collatz sequence behavior.
- [Collatz Sequence Calculator](https://themachobird.com/math/collatz-sequence-calculator): Generate Collatz sequence for a number.
- [Collatz Stopping Time](https://themachobird.com/math/collatz-stopping-time): Calculate Collatz stopping time.
- [Combination Calculator](https://themachobird.com/math/combination-calculator): Calculate combinations C(n,r).
- [Combination Lock](https://themachobird.com/math/combination-lock): Calculate combination lock possibilities.
- [Combination with Repetition](https://themachobird.com/math/combination-repetition): Calculate combinations with repetition.
- [Common Factor Calculator](https://themachobird.com/math/common-factor-calculator): Find common factors shared between two or more numbers.
- [Comparison Test Calculator](https://themachobird.com/math/comparison-test-calculator): Apply comparison test for convergence.
- [Complex Number Argument](https://themachobird.com/math/complex-argument-calculator): Calculate argument of complex number.
- [Complex Number Magnitude](https://themachobird.com/math/complex-magnitude-calculator): Calculate modulus of complex number.
- [Complex Number](https://themachobird.com/math/complex-number): Perform operations on complex numbers.
- [Complex Polar Form](https://themachobird.com/math/complex-polar-form-calculator): Convert complex number to polar form.
- [Composite Shape Calculator](https://themachobird.com/math/composite-shape): Calculate area/volume of composite shapes.
- [Integer Compositions Calculator](https://themachobird.com/math/compositions-calculator): Calculate number of compositions of n.
- [Compound Interest Math](https://themachobird.com/math/compound-interest-math): Mathematical compound interest analysis.
- [Compound Pendulum Calculator](https://themachobird.com/math/compound-pendulum-calculator): Calculate compound pendulum period.
- [Compton Scattering Calculator](https://themachobird.com/math/compton-scattering-calculator): Calculate Compton wavelength shift.
- [Conditional Probability Calculator](https://themachobird.com/math/conditional-probability): Calculate conditional probability P(A|B).
- [Cone Calculator](https://themachobird.com/math/cone-calculator): Calculate cone volume and surface area.
- [Confidence Interval Calculator](https://themachobird.com/math/confidence-interval-calculator): Calculate confidence intervals for population means and proportions.
- ... and 445 more in /math/

### Fitness & Health Calculators (/fitness) — 586 tools
- [10K Pace Calculator](https://themachobird.com/fitness/10k-pace-calculator): Calculate 10K target pace.
- [3-Cone Drill](https://themachobird.com/fitness/3-cone-drill-calculator): Calculate 3-cone drill time.
- [5K Pace Calculator](https://themachobird.com/fitness/5k-pace-calculator): Calculate 5K target pace.
- [A Body Shape Index Calculator](https://themachobird.com/fitness/a-body-shape-index-calculator): Calculate A Body Shape Index for mortality risk.
- [Acute:Chronic Ratio](https://themachobird.com/fitness/acute-chronic-ratio-calculator): Calculate acute to chronic workload ratio.
- [Aggressive Cut Calculator](https://themachobird.com/fitness/aggressive-cut-calculator): Calculate aggressive fat loss calories.
- [Air Force Body Fat Calculator](https://themachobird.com/fitness/air-force-body-fat-calculator): Calculate body fat using Air Force standards.
- [Air Force PFT Calculator](https://themachobird.com/fitness/air-force-pft-calculator): Calculate Air Force Physical Fitness Test.
- [Anorexic BMI Calculator](https://themachobird.com/fitness/anorexic-bmi-calculator): Determine if a BMI indicates anorexic range with health risk assessment.
- [Arm Curl Test](https://themachobird.com/fitness/arm-curl-calculator): Calculate 30-second arm curl score.
- [Army Combat Fitness Test](https://themachobird.com/fitness/army-apt-calculator): Calculate Army Combat Fitness Test score.
- [Army Body Fat Calculator v2](https://themachobird.com/fitness/army-body-fat-calculator-v2): Calculate body fat using Army method.
- [Army Body Fat Calculator](https://themachobird.com/fitness/army-body-fat-calculator): Calculate body fat percentage using the U.S. Army tape test method.
- [Assault Bike Calculator](https://themachobird.com/fitness/assault-bike-calculator): Calculate assault bike calories/time.
- [Atkins Diet Calculator](https://themachobird.com/fitness/atkins-diet-calculator): Calculate Atkins phase macros.
- [Acute Training Load](https://themachobird.com/fitness/atl-calculator): Calculate acute training load.
- [Blood Alcohol Content Calculator](https://themachobird.com/fitness/bac-calculator): Estimate blood alcohol content based on drinks consumed, weight, and time.
- [Back Saver Sit Reach](https://themachobird.com/fitness/back-saver-sit-reach-calculator): Calculate back saver sit and reach score.
- [Back Scratch Test](https://themachobird.com/fitness/back-scratch-calculator): Calculate back scratch reach distance.
- [Barbell Row Standards Female](https://themachobird.com/fitness/barbell-row-standards-female): Calculate female barbell row standards.
- [Barbell Row Standards Male](https://themachobird.com/fitness/barbell-row-standards-male): Calculate male barbell row standards.
- [Baseball Exit Velocity](https://themachobird.com/fitness/baseball-exit-velocity-calculator): Calculate baseball exit velocity.
- [Baseball Pitch Speed](https://themachobird.com/fitness/baseball-pitch-speed-calculator): Calculate baseball pitch speed.
- [Basketball Court Speed](https://themachobird.com/fitness/basketball-court-speed-calculator): Calculate basketball court coverage speed.
- [Basketball Shooting %](https://themachobird.com/fitness/basketball-shooting-percentage-calculator): Calculate basketball shooting percentage.
- [Basketball Vertical Jump](https://themachobird.com/fitness/basketball-vertical-jump-calculator): Calculate basketball vertical jump.
- [BCAA Dosing Calculator](https://themachobird.com/fitness/bcaa-dosing-calculator): Calculate BCAA supplementation dosing.
- [Beep Test Distance](https://themachobird.com/fitness/beep-test-distance-calculator): Calculate beep test distance and level.
- [Beep Test VO2max v2](https://themachobird.com/fitness/beep-test-vo2max-v2): Estimate VO2max from beep test result.
- [Bench Press Standards Female](https://themachobird.com/fitness/bench-press-standards-female): Calculate female bench press standards.
- [Bench Press Standards Male](https://themachobird.com/fitness/bench-press-standards-male): Calculate male bench press standards.
- [Beta Alanine Dosing](https://themachobird.com/fitness/beta-alanine-dosing-calculator): Calculate beta-alanine supplement dosing.
- [Bike Erg Calculator](https://themachobird.com/fitness/bike-erg-calculator): Calculate bike erg performance metrics.
- [Biological Age Fitness](https://themachobird.com/fitness/biological-age-fitness-calculator): Estimate biological age from fitness tests.
- [Blood Pressure Zone](https://themachobird.com/fitness/blood-pressure-zone-calculator): Determine blood pressure training zone.
- [BMI Adult Calculator](https://themachobird.com/fitness/bmi-adult-calculator): Calculate BMI for adults with WHO categories.
- [BMI African American Calculator](https://themachobird.com/fitness/bmi-african-american-calculator): Calculate BMI with African American adjustments.
- [BMI Asian Adults](https://themachobird.com/fitness/bmi-asian-adults-calculator): Calculate BMI with Asian adult cutoffs.
- [BMI Asian Calculator](https://themachobird.com/fitness/bmi-asian-calculator): Calculate BMI with Asian-specific cutoffs.
- [BMI Athletes Calculator](https://themachobird.com/fitness/bmi-athletes-calculator): Calculate BMI with athlete adjustments.
- [BMI Black Adults](https://themachobird.com/fitness/bmi-black-adults-calculator): Calculate BMI with Black adult adjustments.
- [BMI for Bodybuilders Calculator](https://themachobird.com/fitness/bmi-bodybuilders-calculator): Calculate adjusted BMI for muscular individuals.
- [BMI Calculator African American](https://themachobird.com/fitness/bmi-calculator-african): Calculate BMI with African American adjustments.
- [BMI Calculator Asian Cutoffs](https://themachobird.com/fitness/bmi-calculator-asian): Calculate BMI with Asian-specific cutoffs.
- [BMI Calculator Child 2-5](https://themachobird.com/fitness/bmi-calculator-child-2-5): Calculate BMI for toddlers ages 2-5.
- [BMI Calculator Child 6-11](https://themachobird.com/fitness/bmi-calculator-child-6-11): Calculate BMI for children ages 6-11.
- [BMI Calculator European](https://themachobird.com/fitness/bmi-calculator-european): Calculate BMI with European population cutoffs.
- [BMI Calculator Hispanic](https://themachobird.com/fitness/bmi-calculator-hispanic): Calculate BMI with Hispanic population adjustments.
- [BMI Calculator Pacific Islander](https://themachobird.com/fitness/bmi-calculator-pacific): Calculate BMI with Pacific Islander adjustments.
- [BMI Calculator Postpartum](https://themachobird.com/fitness/bmi-calculator-postpartum): Calculate BMI after pregnancy.
- [BMI Calculator Pregnant](https://themachobird.com/fitness/bmi-calculator-pregnant): Calculate BMI during pregnancy.
- [BMI Calculator Teen 12-19](https://themachobird.com/fitness/bmi-calculator-teen-12-19): Calculate BMI for teenagers 12-19.
- [BMI Calculator](https://themachobird.com/fitness/bmi-calculator): Calculate your Body Mass Index (BMI) with weight category, ideal weight range, BMI Prime, and health risk assessment.
- [BMI Children 2-20 Calculator](https://themachobird.com/fitness/bmi-children-2-20-calculator): Calculate BMI percentile for children ages 2-20.
- [BMI Children 5-19](https://themachobird.com/fitness/bmi-children-5-19-calculator): Calculate BMI percentile for children ages 5-19.
- [BMI Boys Calculator](https://themachobird.com/fitness/bmi-children-boys-calculator): Calculate BMI percentile for boys.
- [BMI Children Calculator](https://themachobird.com/fitness/bmi-children-calculator): Calculate BMI for children ages 2-20.
- [BMI Girls Calculator](https://themachobird.com/fitness/bmi-children-girls-calculator): Calculate BMI percentile for girls.
- [BMI European Adults](https://themachobird.com/fitness/bmi-european-adults-calculator): Calculate BMI with European adult cutoffs.
- [BMI Hispanic Adults](https://themachobird.com/fitness/bmi-hispanic-adults-calculator): Calculate BMI with Hispanic adult adjustments.
- [BMI Hispanic Calculator](https://themachobird.com/fitness/bmi-hispanic-calculator): Calculate BMI with Hispanic population adjustments.
- [BMI Infant Calculator](https://themachobird.com/fitness/bmi-infant-calculator): Calculate BMI for infants and toddlers.
- [BMI Middle Aged](https://themachobird.com/fitness/bmi-middle-aged-calculator): Calculate BMI recommendations for ages 40-65.
- [BMI Muscular Calculator](https://themachobird.com/fitness/bmi-muscular-calculator): Calculate BMI accounting for muscle mass.
- [BMI Pacific Islanders](https://themachobird.com/fitness/bmi-pacific-islanders-calculator): Calculate BMI with Pacific Islander adjustments.
- [BMI Pregnancy Calculator](https://themachobird.com/fitness/bmi-pregnancy-calculator): Calculate BMI during pregnancy trimesters.
- [BMI Seniors 65+](https://themachobird.com/fitness/bmi-seniors-calculator): Calculate BMI guidelines for seniors over 65.
- [BMI Teens Calculator](https://themachobird.com/fitness/bmi-teens-calculator): Calculate BMI for teenagers 13-19.
- [BMR Bodybuilders](https://themachobird.com/fitness/bmr-bodybuilders-calculator): Calculate BMR for bodybuilders with muscle mass.
- [BMR Calculator](https://themachobird.com/fitness/bmr-calculator): Calculate basal metabolic rate using Mifflin-St Jeor or Harris-Benedict formulas.
- [BMR Cunningham Calculator](https://themachobird.com/fitness/bmr-cunningham-calculator): Calculate BMR using Cunningham formula.
- [BMR Extra Active](https://themachobird.com/fitness/bmr-extra-active-calculator): Calculate BMR for extra active lifestyle.
- [BMR Healthy Calculator](https://themachobird.com/fitness/bmr-healthy-calculator): Calculate BMR for healthy weight maintenance.
- [BMR Katch-McArdle Calculator](https://themachobird.com/fitness/bmr-katch-mcardle-calculator): Calculate BMR using Katch-McArdle formula.
- [BMR Lightly Active](https://themachobird.com/fitness/bmr-lightly-active-calculator): Calculate BMR for lightly active lifestyle.
- [BMR Moderately Active](https://themachobird.com/fitness/bmr-moderately-active-calculator): Calculate BMR for moderate activity.
- [BMR Rapid Calculator](https://themachobird.com/fitness/bmr-rapid-calculator): Quick BMR estimate using simplified formula.
- [BMR Roza-Shizgal Calculator](https://themachobird.com/fitness/bmr-roza-shizgal-calculator): Calculate BMR using Roza-Shizgal equation.
- [BMR Schofield Calculator](https://themachobird.com/fitness/bmr-schofield-calculator): Calculate BMR using Schofield equation.
- [BMR Sedentary Calculator](https://themachobird.com/fitness/bmr-sedentary-calculator): Calculate BMR for sedentary lifestyle.
- ... and 506 more in /fitness/

### Other Calculators (/other) — 1029 tools
- [401k Calculator v2](https://themachobird.com/other/401k-calculator-v2): Calculate 401k growth and match.
- [401k Match Calculator](https://themachobird.com/other/401k-match-calculator): Calculate employer 401k match and total contribution.
- [529 Plan Calculator](https://themachobird.com/other/529-plan-calculator): Calculate 529 plan growth.
- [A/B Test Significance](https://themachobird.com/other/ab-test-significance-calculator): Calculate A/B test statistical significance.
- [Absenteeism Cost Calculator](https://themachobird.com/other/absenteeism-cost-calculator): Calculate cost of employee absenteeism.
- [Accounts Payable Days](https://themachobird.com/other/accounts-payable-days-calculator): Calculate average days to pay accounts payable.
- [Accounts Receivable Days](https://themachobird.com/other/accounts-receivable-days-calculator): Calculate average days to collect receivables.
- [Accumulation Phase Calculator](https://themachobird.com/other/accumulation-phase-calculator): Calculate growth during wealth accumulation phase.
- [Acid Test Ratio](https://themachobird.com/other/acid-test-ratio-calculator): Calculate acid test ratio excluding inventory.
- [Home Addition Cost Calculator](https://themachobird.com/other/addition-cost-calculator): Estimate home addition cost per square foot.
- [Age Calculator](https://themachobird.com/other/age-calculator): Calculate exact age in years, months, and days from birth date. Also find age difference between two dates.
- [Age in Months Calculator (Other Calculators)](https://themachobird.com/other/age-in-months-calculator): Use this free Age in Months Calculator (Other Calculators) to find what percentage one value represents of another, with
- [Age in Seconds Calculator](https://themachobird.com/other/age-in-seconds-calculator): Calculate age in seconds.
- [Age in Weeks Calculator](https://themachobird.com/other/age-in-weeks-calculator): Calculate exact age in weeks.
- [Aliasing Calculator](https://themachobird.com/other/aliasing-calculator): Calculate aliasing frequency.
- [Amplifier Power Calculator](https://themachobird.com/other/amplifier-power-calculator): Calculate amplifier power requirements.
- [Angular Momentum Calculator](https://themachobird.com/other/angular-momentum-calculator): Calculate angular momentum.
- [Angular Velocity Calculator](https://themachobird.com/other/angular-velocity-calculator): Calculate angular velocity.
- [Annual Recurring Revenue](https://themachobird.com/other/annual-recurring-revenue-calculator): Calculate annual recurring revenue from MRR.
- [Annual to Hourly Salary](https://themachobird.com/other/annual-to-hourly-salary-calculator): Convert annual salary to hourly rate.
- [Annuity Calculator v2](https://themachobird.com/other/annuity-calculator-v2): Calculate annuity payout amount.
- [Antenna Gain Calculator](https://themachobird.com/other/antenna-gain-calculator): Calculate antenna gain dBi.
- [Antenna Length Calculator](https://themachobird.com/other/antenna-length-calculator): Calculate antenna length for frequency.
- [Antenna Wavelength Calculator](https://themachobird.com/other/antenna-wavelength-calculator): Use this free Antenna Wavelength Calculator to work out what percentage one value represents of another, with accurate a
- [Appliance Energy](https://themachobird.com/other/appliance-energy-calculator): Calculate appliance energy cost.
- [Appliance Repair Cost Estimator](https://themachobird.com/other/appliance-repair-calculator): Estimate appliance repair vs replacement cost.
- [Appliance Replacement Cost](https://themachobird.com/other/appliance-replacement-calculator): Estimate appliance replacement cost and energy savings.
- [Adjusted Present Value](https://themachobird.com/other/apv-calculator): Calculate adjusted present value for leveraged deals.
- [Area Conversion](https://themachobird.com/other/area-conversion-calculator): Convert between area units.
- [Area Under Curve](https://themachobird.com/other/area-under-curve-calculator): Calculate area under curve.
- [ARM Adjustment Calculator](https://themachobird.com/other/arm-adjustment-calculator): Calculate adjustable rate mortgage payment changes.
- [ARR Growth Calculator](https://themachobird.com/other/arr-growth-calculator): Calculate ARR growth rate and projections.
- [Aspect Ratio Calculator (Other Calculators)](https://themachobird.com/other/aspect-ratio-calculator): Calculate display aspect ratio.
- [Asset Turnover Ratio](https://themachobird.com/other/asset-turnover-calculator): Calculate total asset turnover ratio.
- [Attendance Calculator](https://themachobird.com/other/attendance-calculator): Calculate attendance percentage instantly. Free online attendance calculator with shortage warnings, classes needed, and
- [Attenuation Calculator](https://themachobird.com/other/attenuation-calculator): Calculate signal attenuation.
- [Attic Insulation Calculator](https://themachobird.com/other/attic-insulation-calculator): Calculate attic insulation needs and R-value.
- [Audio File Size v2](https://themachobird.com/other/audio-file-size-calculator-v2): Calculate audio file size.
- [Aura Color v2](https://themachobird.com/other/aura-color-calculator-v2): Calculate your aura color.
- [Auto Insurance Premium](https://themachobird.com/other/auto-insurance-premium-calculator): Estimate auto insurance premium from vehicle details.
- [Debt Avalanche Calculator](https://themachobird.com/other/avalanche-calculator): Calculate debt avalanche payoff.
- [Average Deal Size Calculator](https://themachobird.com/other/average-deal-size-calculator): Calculate average deal size for sales team.
- [Average Rate of Change](https://themachobird.com/other/average-rate-of-change-calculator): Calculate average rate of change.
- [Average Revenue Per User](https://themachobird.com/other/average-revenue-per-user-calculator): Calculate average revenue per user for subscriptions.
- [Baby Registry Total Cost](https://themachobird.com/other/baby-registry-cost-calculator): Calculate total baby registry and nursery costs.
- [Backpacking Calculator](https://themachobird.com/other/backpacking-calculator): Calculate backpacking weight needs.
- [Backsplash Area Calculator](https://themachobird.com/other/backsplash-area-calculator): Calculate backsplash tile area and material needed.
- [Baggage Fee Calculator v2](https://themachobird.com/other/baggage-fee-calculator-v2): Calculate airline baggage fees.
- [Baking Substitution](https://themachobird.com/other/baking-substitution-calculator): Calculate baking ingredient substitutions.
- [Bandwidth Calculator v2](https://themachobird.com/other/bandwidth-calculator-v2): Calculate bandwidth requirements.
- [Bandwidth Calculator](https://themachobird.com/other/bandwidth-calculator): Calculate download and upload times based on file size and connection speed.
- [Base Conversion](https://themachobird.com/other/base-conversion-calculator): Convert between number bases.
- [Basement Finishing Cost](https://themachobird.com/other/basement-finish-calculator): Estimate basement finishing cost per square foot.
- [Bathroom Remodel Cost](https://themachobird.com/other/bathroom-remodel-calculator): Estimate bathroom renovation cost by scope.
- [Battery Charging Time](https://themachobird.com/other/battery-charging-time-calculator): Calculate battery charging time from capacity and rate.
- [Battery Life Calculator](https://themachobird.com/other/battery-life-calculator): Calculate battery life from capacity and draw.
- [Bayes Posterior Calculator](https://themachobird.com/other/bayes-posterior-calculator): Use this free Bayes Posterior Calculator to find what percentage one value represents of another, with instant and accur
- [Beat Frequency Calculator](https://themachobird.com/other/beat-frequency-calculator): Calculate beat frequency.
- [Beer ABV Calculator](https://themachobird.com/other/beer-abv-calculator): Calculate beer alcohol content.
- [Beer IBU Calculator](https://themachobird.com/other/beer-ibu-calculator): Calculate beer bitterness (IBU).
- [Binomial Probability](https://themachobird.com/other/binomial-probability-calculator): Calculate binomial distribution probability.
- [Birthday Paradox Calculator](https://themachobird.com/other/birthday-paradox-calculator): Calculate birthday paradox probability.
- [Birthstone Calculator](https://themachobird.com/other/birthstone-calculator): Find your birthstone by month.
- [Bitcoin Halving Calculator](https://themachobird.com/other/bitcoin-halving-calculator): Calculate Bitcoin halving impact on mining rewards.
- [Bitcoin Mining Calculator](https://themachobird.com/other/bitcoin-mining-calculator): Calculate Bitcoin mining revenue and costs.
- [Biweekly to Annual Salary](https://themachobird.com/other/biweekly-to-annual-salary-calculator): Convert biweekly pay to annual salary.
- [Black-Scholes Option Price](https://themachobird.com/other/black-scholes-calculator): Calculate option price using Black-Scholes model.
- [Blood Alcohol v2](https://themachobird.com/other/blood-alcohol-calculator-v2): Calculate blood alcohol content.
- [BMI Metric Imperial](https://themachobird.com/other/bmi-metric-imperial-calculator): Convert BMI between metric and imperial.
- [Bond Ytm Calculator](https://themachobird.com/other/bond-ytm-calculator): Use this free Bond Ytm Calculator to project how invested money grows with compound interest and see the future value an
- [Bonus Tax Calculator](https://themachobird.com/other/bonus-tax-calculator): Calculate effective tax rate on bonuses.
- [Book Value Calculator](https://themachobird.com/other/book-value-calculator): Calculate asset book value.
- [Book Value After Depreciation](https://themachobird.com/other/book-value-depreciation-calculator): Calculate book value at any point in depreciation.
- [Bounce Rate Impact](https://themachobird.com/other/bounce-rate-impact-calculator): Calculate revenue impact of bounce rate changes.
- [Bra Size Calculator](https://themachobird.com/other/bra-size-calculator): Determine accurate bra size from band and bust measurements.
- [Braking Fuel Waste Calculator](https://themachobird.com/other/brake-fuel-calculator): Calculate fuel wasted by aggressive driving.
- [Brake Repair Cost Calculator](https://themachobird.com/other/brake-repair-calculator): Estimate brake repair cost by component.
- [Bread Hydration Calculator](https://themachobird.com/other/bread-hydration-calculator): Calculate bread dough hydration percentage.
- [Break Even Calculator v2](https://themachobird.com/other/break-even-calculator-v2): Calculate break even point.
- [Brick Calculator Alt](https://themachobird.com/other/brick-calculator-alt): Use this free Brick Calculator Alt to find what percentage one value represents of another, with quick and accurate resu
- ... and 949 more in /other/

## For AI agents
- All tools are GET-able static HTML with semantic H1, breadcrumbs, FAQ, and JSON-LD.
- Use sitemap.xml for discovery. Respect robots.txt.
- Donations keep the corpus accurate and ad-light — see Donate in footer.
- No AI filler; US search intent; calculations are pure JS, no data collection.