# Momo Tools

> Free online tools that run entirely in the browser — fast, private, no signup required. 229+ tools across calculators, finance, time, developer, text, image, health and everyday utilities.

## Calculators
- [Percentage Calculator](/tools/percentage-calculator/): Percentages, discounts & percent change.
- [Aspect Ratio Calculator](/tools/aspect-ratio-calculator/): Keep proportions when resizing.
- [Average Calculator](/tools/average-calculator/): Mean, median, sum, min and max.
- [GPA Calculator](/tools/gpa-calculator/): Weighted GPA from grades and credits.
- [Final Grade Calculator](/tools/final-grade-calculator/): Score needed on your final exam.
- [Fuel Cost Calculator](/tools/fuel-cost-calculator/): Estimate the fuel cost of a trip.
- [Electricity Cost Calculator](/tools/electricity-cost-calculator/): Running cost of any appliance.
- [GCD & LCM Calculator](/tools/gcd-lcm-calculator/): Greatest common divisor & LCM.
- [Scientific Calculator](/tools/scientific-calculator/): Trig, logs, powers & roots online.
- [Fraction Calculator](/tools/fraction-calculator/): Add, subtract, multiply & divide fractions.
- [Dimensional Weight Calculator](/tools/dimensional-weight-calculator/): Volumetric & billable shipping weight.
- [Paint Calculator](/tools/paint-calculator/): How much paint do you need?
- [Tile Calculator](/tools/tile-calculator/): How many tiles do you need?
- [Concrete Calculator](/tools/concrete-calculator/): Concrete volume and bags.
- [Tire Size Calculator](/tools/tire-size-calculator/): Tire diameter & circumference.
- [Fence Calculator](/tools/fence-calculator/): Posts and panels needed.

## Finance
- [Tip Calculator](/tools/tip-calculator/): Calculate tips and split the bill instantly.
- [Salary Calculator](/tools/salary-calculator/): Convert hourly wage to annual salary and back.
- [Sales Tax Calculator](/tools/sales-tax-calculator/): Add or remove sales tax from any amount.
- [Loan Calculator](/tools/loan-calculator/): Estimate monthly loan & mortgage payments.
- [Compound Interest Calculator](/tools/compound-interest-calculator/): Grow savings with compound interest.
- [Discount Calculator](/tools/discount-calculator/): Final price and how much you save.
- [Profit Margin Calculator](/tools/margin-calculator/): Profit, margin and markup from cost & price.
- [VAT Calculator](/tools/vat-calculator/): Add or remove VAT at any rate.
- [EMI Calculator](/tools/emi-calculator/): Monthly loan EMI, interest & total.
- [Zakat Calculator](/tools/zakat-calculator/): 2.5% Zakat on your net assets.
- [Rent Split Calculator](/tools/rent-split-calculator/): Split rent fairly between roommates.
- [Savings Goal Calculator](/tools/savings-goal-calculator/): Monthly amount to hit your goal.
- [Simple Interest Calculator](/tools/simple-interest-calculator/): Interest and total from P, r and t.
- [SIP Calculator](/tools/sip-calculator/): Mutual fund SIP returns & maturity value.
- [FD Calculator](/tools/fd-calculator/): Fixed deposit maturity & interest.
- [PPF Calculator](/tools/ppf-calculator/): Public Provident Fund growth over 15 years.
- [GST Calculator](/tools/gst-calculator/): Add or remove GST at any rate.
- [ROI Calculator](/tools/roi-calculator/): Return on investment & annualized ROI.
- [Net Worth Calculator](/tools/net-worth-calculator/): Total assets minus liabilities.
- [Break-Even Calculator](/tools/break-even-calculator/): Units to sell to break even.
- [Currency Converter](/tools/currency-converter/): Convert between 150+ world currencies.
- [HRA Calculator](/tools/hra-calculator/): House Rent Allowance exemption (India).
- [Gratuity Calculator](/tools/gratuity-calculator/): End-of-service gratuity (India & UAE).
- [THR Calculator](/tools/thr-calculator/): Tunjangan Hari Raya allowance (Indonesia).
- [13th Month Salary Calculator](/tools/thirteenth-salary-calculator/): Pro-rated 13th salary / aguinaldo.
- [401(k) Calculator](/tools/401k-calculator/): Project US retirement savings growth.
- [Meeting Cost Calculator](/tools/meeting-cost-calculator/): See what a meeting really costs.
- [Invoice Generator](/tools/invoice-generator/): Free invoice & quote maker (print/PDF).
- [Expense Tracker](/tools/expense-tracker/): Log daily spending, see totals by category.
- [Unit Price Calculator](/tools/unit-price-calculator/): Compare price per unit to find deals.
- [Subscription Cost Calculator](/tools/subscription-cost-calculator/): Add up what your subscriptions really cost.
- [GSTIN Validator](/tools/gstin-validator/): Validate an Indian GST number & checksum.

## Converters
- [Unit Converter](/tools/unit-converter/): Convert length, weight, volume & temperature.
- [Number Base Converter](/tools/base-converter/): Convert binary, octal, decimal & hex.
- [Roman Numeral Converter](/tools/roman-numeral-converter/): Convert numbers to Roman numerals.
- [Cooking Converter](/tools/cooking-converter/): Cups, tbsp, tsp, ml & fl oz.
- [Number to Words](/tools/number-to-words/): Write numbers in English words.
- [Temperature Converter](/tools/temperature-converter/): Celsius, Fahrenheit and Kelvin.
- [Scientific Notation Converter](/tools/scientific-notation-converter/): Convert to and from scientific notation.
- [Data Storage Converter](/tools/data-storage-converter/): Bytes, KB, MB, GB, TB and more.
- [Speed Converter](/tools/speed-converter/): mph, km/h, m/s, knots.
- [Area Converter](/tools/area-converter/): Sq ft, sq m, acres, hectares.
- [Angle Converter](/tools/angle-converter/): Degrees, radians and gradians.
- [Clothing Size Converter](/tools/clothing-size-converter/): US, UK, EU & IT clothing sizes.
- [Shoe Size Converter](/tools/shoe-size-converter/): US, UK, EU & CM shoe sizes.
- [Plug & Voltage Guide](/tools/plug-voltage-guide/): Plug types & voltage by country.
- [Fuel Efficiency Converter](/tools/fuel-efficiency-converter/): MPG, L/100km and km/L.
- [Ring Size Converter](/tools/ring-size-converter/): US, UK, EU, JP & mm ring sizes.
- [Pressure Converter](/tools/pressure-converter/): Pa, bar, psi, atm & mmHg.
- [Energy Converter](/tools/energy-converter/): Joule, calorie, Wh & kWh.
- [Power Converter](/tools/power-converter/): Watt, kW, hp & PS.

## Text
- [Word Counter](/tools/word-counter/): Count words, characters, sentences & reading time.
- [Case Converter](/tools/case-converter/): Change text to UPPER, lower, Title & more.
- [Lorem Ipsum Generator](/tools/lorem-ipsum-generator/): Generate placeholder text fast.
- [Slug Generator](/tools/slug-generator/): Turn text into clean URL slugs.
- [Text Diff Checker](/tools/text-diff/): Compare two texts and see changes.
- [Markdown Preview](/tools/markdown-preview/): Write Markdown, see it rendered live.
- [Remove Duplicate Lines](/tools/remove-duplicate-lines/): Delete repeated lines from text.
- [Text Sorter](/tools/text-sorter/): Sort lines A-Z, Z-A or by length.
- [Text Repeater](/tools/text-repeater/): Repeat text any number of times.
- [Reverse Text](/tools/reverse-text/): Reverse characters, words or lines.
- [Word Frequency Counter](/tools/word-frequency-counter/): Count how often each word appears.
- [Find and Replace Text](/tools/find-and-replace/): Replace text, with regex option.
- [Remove Line Breaks](/tools/remove-line-breaks/): Strip or replace line breaks.
- [Morse Code Translator](/tools/morse-code-translator/): Translate text to Morse and back.
- [Binary Translator](/tools/binary-translator/): Convert text to binary and back.
- [ROT13 & Caesar Cipher](/tools/rot13-caesar-cipher/): Encode and decode shift ciphers.
- [NATO Phonetic Alphabet](/tools/nato-phonetic-alphabet/): Spell words with Alpha, Bravo, Charlie.
- [Fancy Text Generator](/tools/fancy-text-generator/): Cool Unicode fonts for social media.
- [Remove Extra Spaces](/tools/remove-extra-spaces/): Trim and collapse extra whitespace.
- [Readability Score Checker](/tools/readability-score/): Flesch reading ease & grade level.
- [Citation Generator](/tools/citation-generator/): APA, MLA & Chicago citations.
- [Syllable Counter](/tools/syllable-counter/): Count syllables in English text.
- [Remove Accents](/tools/remove-accents/): Strip diacritics from text.

## Time
- [Age Calculator](/tools/age-calculator/): Exact age in years, months & days.
- [Countdown Timer](/tools/countdown-timer/): Simple countdown with alert.
- [Date Difference Calculator](/tools/date-difference-calculator/): Days between two dates.
- [Work Hours Calculator](/tools/hours-calculator/): Hours worked and pay from a shift.
- [Time Calculator](/tools/time-calculator/): Add or subtract hours, minutes, seconds.
- [Day of the Week Calculator](/tools/day-of-week-calculator/): Find the weekday of any date.
- [Leap Year Checker](/tools/leap-year-checker/): Is a year a leap year?
- [Stopwatch](/tools/stopwatch/): Online stopwatch with laps.
- [Pomodoro Timer](/tools/pomodoro-timer/): Focus with 25/5 work-break cycles.
- [Time Zone Converter](/tools/time-zone-converter/): Compare times across cities.
- [Business Days Calculator](/tools/business-days-calculator/): Working days between two dates.
- [Hijri Date Converter](/tools/hijri-date-converter/): Convert Gregorian ↔ Islamic dates.
- [Japanese Era Converter](/tools/japanese-era-converter/): Convert Gregorian ↔ Japanese era (和暦).
- [Alarm Clock](/tools/alarm-clock/): Set an online alarm with a sound.
- [Monthly Calendar](/tools/monthly-calendar/): Browse & print any month.
- [Event Countdown](/tools/event-countdown/): Live countdown to any date.

## Developer
- [Base64 Encode / Decode](/tools/base64-encode-decode/): Encode and decode Base64 text instantly.
- [JSON Formatter](/tools/json-formatter/): Format, validate & minify JSON.
- [UUID Generator](/tools/uuid-generator/): Generate random UUID v4 identifiers.
- [Timestamp Converter](/tools/timestamp-converter/): Convert Unix timestamps to human dates.
- [Hash Generator](/tools/hash-generator/): SHA-1, SHA-256 and SHA-512 hashes.
- [URL Encoder / Decoder](/tools/url-encoder/): Percent-encode and decode URLs.
- [JWT Decoder](/tools/jwt-decoder/): Decode JWT header and payload.
- [CSV to JSON](/tools/csv-to-json/): Convert CSV data to JSON and back.
- [Regex Tester](/tools/regex-tester/): Test regular expressions live.
- [HTML Entity Encoder / Decoder](/tools/html-entity-encoder/): Encode and decode HTML entities.
- [Number Formatter](/tools/number-formatter/): Add thousands separators & decimals.
- [UTM Link Builder](/tools/utm-builder/): Build trackable campaign URLs.
- [HTTP Status Codes](/tools/http-status-codes/): Look up any HTTP status code.
- [User Agent Parser](/tools/user-agent-parser/): Detect browser, OS and device.
- [HTML Minifier](/tools/html-minifier/): Shrink HTML by removing whitespace.
- [CSS Minifier](/tools/css-minifier/): Compress CSS by removing whitespace.
- [Cron Expression Parser](/tools/cron-expression-parser/): Explain cron & see the next runs.
- [CIDR Subnet Calculator](/tools/cidr-calculator/): IPv4 network, mask & host range.
- [SQL Formatter](/tools/sql-formatter/): Format & beautify SQL queries.
- [PX to REM Converter](/tools/px-to-rem-converter/): Convert px ↔ rem for CSS.
- [Chmod Calculator](/tools/chmod-calculator/): Unix file permissions (octal ↔ rwx).
- [JSON Diff Checker](/tools/json-diff-checker/): Compare two JSON objects by key.
- [MAC Address Generator](/tools/mac-address-generator/): Random MAC addresses for testing.
- [Query String Parser](/tools/query-string-parser/): URL query string to JSON.
- [ASCII / Unicode Lookup](/tools/ascii-unicode-lookup/): Characters to code points.

## Health
- [BMI Calculator](/tools/bmi-calculator/): Body Mass Index, metric or imperial.
- [BMR & Calorie Calculator](/tools/bmr-calculator/): Basal metabolic rate & daily calories.
- [Ideal Weight Calculator](/tools/ideal-weight-calculator/): Healthy weight range for your height.
- [Pace Calculator](/tools/pace-calculator/): Running pace, speed and time.
- [Pregnancy Due Date Calculator](/tools/due-date-calculator/): Estimate your baby's due date.
- [Body Fat Calculator](/tools/body-fat-calculator/): Estimate body fat with the Navy method.
- [Water Intake Calculator](/tools/water-intake-calculator/): How much water to drink daily.
- [Ovulation Calculator](/tools/ovulation-calculator/): Estimate your fertile window.
- [Macro Calculator](/tools/macro-calculator/): Daily protein, carbs & fat targets.
- [Heart Rate Zone Calculator](/tools/heart-rate-zone-calculator/): Target training zones from your age.
- [Calories Burned Calculator](/tools/calories-burned-calculator/): Estimate calories burned by activity.
- [Sleep Calculator](/tools/sleep-calculator/): Best bedtime & wake-up times.
- [BAC Calculator](/tools/bac-calculator/): Estimate blood alcohol content.
- [One Rep Max Calculator](/tools/one-rep-max-calculator/): Estimate 1RM and training percentages.
- [Barbell Plate Calculator](/tools/barbell-plate-calculator/): Load plates for any target weight.
- [Training Volume Calculator](/tools/training-volume-calculator/): Sets × reps × weight, by muscle group.
- [Race Time Predictor](/tools/race-time-predictor/): Predict 5K to marathon from a recent race.
- [VDOT Calculator](/tools/vdot-calculator/): Jack Daniels training paces from a race.
- [Swim Pace Calculator](/tools/swim-pace-calculator/): Pool pace, splits and CSS estimate.
- [Cycling FTP Calculator](/tools/cycling-ftp-calculator/): FTP estimate and Coggan power zones.
- [HIIT Timer](/tools/hiit-timer/): Tabata, EMOM and custom interval timer.
- [VO2 Max Calculator](/tools/vo2-max-calculator/): Estimate VO2max from a run or heart rate.
- [Protein Intake Calculator](/tools/protein-intake-calculator/): Daily protein grams by goal and training.
- [Running Cadence Metronome](/tools/running-cadence-metronome/): Audible steps-per-minute trainer.

## Image
- [Image Compressor](/tools/image-compressor/): Compress JPG, PNG & WebP online — free, no signup.
- [QR Code Generator](/tools/qr-code-generator/): Create QR codes for links, text, Wi-Fi & more.
- [Image to Base64](/tools/image-to-base64/): Convert an image to a Base64 data URI.
- [Image Resizer](/tools/image-resizer/): Resize images by width, height or ratio.
- [Wi-Fi QR Code Generator](/tools/wifi-qr-code/): Let guests scan to join your Wi-Fi.
- [Image Cropper](/tools/image-cropper/): Crop images online to any size.
- [Image Format Converter](/tools/image-format-converter/): Convert between JPG, PNG and WebP.
- [HEIC to JPG](/tools/heic-to-jpg/): Convert iPhone HEIC photos to JPG — free, private.
- [Image Watermark](/tools/image-watermark/): Add a text watermark to images.
- [QR Code Scanner](/tools/qr-code-scanner/): Read a QR code from an image.
- [Round Image Corners](/tools/round-image-corners/): Rounded corners or a perfect circle avatar.
- [Rotate & Flip Image](/tools/rotate-image/): Rotate, mirror or straighten a photo.
- [Add Border to Image](/tools/add-border-to-image/): White, black or polaroid photo frames.
- [Blur / Pixelate Image](/tools/blur-image/): Censor screenshots — blur or mosaic any area.
- [SVG to PNG](/tools/svg-to-png/): Vector in, crisp pixels out — at any scale.
- [Add Text to Image](/tools/add-text-to-image/): Captions, memes and labels — drag into place.
- [EXIF Viewer & Remover](/tools/exif-remover/): See what your photo reveals — then strip it.
- [Image Splitter](/tools/image-splitter/): Cut one photo into a 3×3 Instagram grid.

## PDF
- [Image to PDF](/tools/image-to-pdf/): Convert JPG/PNG images to a PDF.
- [PDF to JPG](/tools/pdf-to-jpg/): Convert PDF pages to images.
- [Compress PDF](/tools/pdf-compress/): Shrink PDF file size — free, private, no upload.
- [Merge PDF](/tools/pdf-merge/): Combine multiple PDFs into one.
- [Split PDF](/tools/pdf-split/): Extract pages from a PDF.
- [Rotate PDF](/tools/pdf-rotate/): Rotate PDF pages 90/180/270°.
- [PDF Watermark](/tools/pdf-watermark/): Stamp text across every PDF page.
- [PDF Page Numbers](/tools/pdf-page-numbers/): Add page numbers to a PDF.

## Design
- [Color Converter](/tools/color-converter/): Convert between HEX, RGB and HSL.
- [Color Contrast Checker](/tools/color-contrast-checker/): WCAG contrast ratio for two colors.
- [CSS Gradient Generator](/tools/css-gradient-generator/): Build CSS gradients visually.
- [CSS Box Shadow Generator](/tools/css-box-shadow-generator/): Design box shadows visually.
- [Color Shades Generator](/tools/color-shades-generator/): Tints and shades of any color.
- [Color Palette Generator](/tools/color-palette-generator/): Harmonious color schemes from a base.
- [CSS Flexbox Generator](/tools/css-flexbox-generator/): Build flex layouts visually.
- [Image Color Picker](/tools/image-color-picker/): Pick HEX colors from an image.
- [CSS Grid Generator](/tools/css-grid-generator/): Build CSS grid layouts visually.
- [Favicon Generator](/tools/favicon-generator/): Any image or letter → full favicon pack.
- [Screenshot Beautifier](/tools/screenshot-beautifier/): Rounded corners, shadow, any background — or none.

## Productivity
- [Online Notepad](/tools/online-notepad/): A quick notepad that auto-saves.
- [To-Do List](/tools/to-do-list/): A private to-do list that auto-saves.
- [Typing Speed Test](/tools/typing-speed-test/): Measure your typing speed in WPM.
- [Habit Tracker](/tools/habit-tracker/): Track daily habits & streaks.
- [Emoji Picker](/tools/emoji-picker/): Browse & copy emojis and symbols.
- [Text to Speech](/tools/text-to-speech/): Read any text aloud with browser voices.

## Security
- [Password Generator](/tools/password-generator/): Create strong, random passwords instantly.
- [2FA Code Generator](/tools/2fa-generator/): TOTP authenticator codes — 100% local & private.
- [Password Strength Checker](/tools/password-strength-checker/): Estimate password strength & entropy.
- [Credit Card Validator](/tools/credit-card-validator/): Check a card number with Luhn.
- [CPF / CNPJ Validator](/tools/cpf-cnpj-validator/): Validate Brazilian CPF and CNPJ numbers.
- [IBAN Validator](/tools/iban-validator/): Check IBAN checksum and country length.
- [Text Encrypt / Decrypt](/tools/text-encrypt/): Password-protect text with AES-256.
- [ISBN Validator](/tools/isbn-validator/): Check ISBN-10 and ISBN-13 check digits.
- [Chile RUT Validator](/tools/rut-validator/): Validate a Chilean RUT/RUN check digit.
- [Mexico CURP Validator](/tools/curp-validator/): Validate a Mexican CURP & check digit.
- [Mexico RFC Validator](/tools/rfc-validator/): Validate a Mexican RFC structure.
- [Argentina CUIT / CUIL Validator](/tools/cuit-validator/): Validate a CUIT/CUIL check digit.
- [South Africa ID Validator](/tools/sa-id-validator/): Validate a South African ID number.
- [Poland PESEL Validator](/tools/pesel-validator/): Validate a Polish PESEL check digit.
- [Spain DNI / NIE Validator](/tools/dni-nie-validator/): Validate a Spanish DNI or NIE.
- [France SIREN / SIRET Validator](/tools/siren-siret-validator/): Validate a French SIREN or SIRET.
- [Italy Codice Fiscale Validator](/tools/codice-fiscale-validator/): Validate an Italian Codice Fiscale.
- [Singapore NRIC / FIN Validator](/tools/singapore-nric-validator/): Validate a Singapore NRIC or FIN.
- [Australia ABN Validator](/tools/abn-validator/): Validate an Australian ABN.
- [Japan My Number Validator](/tools/japan-mynumber-validator/): Validate a Japanese My Number.
- [Thailand National ID Validator](/tools/thailand-id-validator/): Validate a Thai national ID number.
- [Barcode Validator (EAN-13 / UPC-A)](/tools/barcode-validator/): Validate EAN-13 and UPC-A barcodes.
- [India PAN Validator](/tools/india-pan-validator/): Validate an Indian PAN format.
- [Germany Steuer-ID Validator](/tools/germany-steuer-id-validator/): Validate a German tax ID.
- [ISIN Validator](/tools/isin-validator/): Validate a securities ISIN.

## Random
- [Random Number Generator](/tools/random-number-generator/): Random integers in any range.
- [Random Picker](/tools/random-picker/): Pick a random item from a list.
- [Dice Roller](/tools/dice-roller/): Roll any number of dice online.
- [Coin Flip](/tools/coin-flip/): Flip a virtual coin — heads or tails.
- [Wheel Spinner](/tools/wheel-spinner/): Spin a wheel to pick a random winner.
- [Random Group Generator](/tools/group-generator/): Split a list of names into random teams.

## Platform
- [Tool Chains](/chain/): Pipe tools together into multi-step text pipelines — the whole chain fits in a shareable link.
- [Why local?](/why-local/): Why these tools process everything on-device and never upload your files.

## About
All tools are free and run client-side (your files and text never leave your device).
Some outbound recommendation links are affiliate links.