Mobile browser tools — compress, resize, generate, strip
Privacy-first photo and QR utilities that run entirely in your browser. No uploads, no signup, nothing leaves your device.
Tools
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Image Tools (15)
Crop, rotate, flip, blur, sharpen, B&W, sepia, border, round, remove BG, compress, resize, EXIF strip, QR, watermark.
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Text Tools (10)
Case, count, sort, dedup, lorem ipsum, diff, slugify, encode, escape, and find-replace.
See all 10 tools →
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Advanced Text (10)
Stats, word frequency, n-gram analysis, text reverser, mirror, zalgo, leet, vaporwave, small caps, upside-down.
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Dev Tools(10)
JSON Formatter
Format, minify, and validate JSON with interactive tree view.
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YAML Formatter
Format and validate YAML, convert between YAML and JSON.
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SQL Formatter
Format SQL with ANSI, MySQL, or PostgreSQL dialect.
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Regex Tester
Test regex patterns with match highlighting and capture groups.
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JWT Decoder
Decode and inspect JWT header, payload, and signature.
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UUID Generator
Generate UUID v4, v7, or NIL — single or in batch.
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Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-512 hashes for text or files.
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URL Tools
Parse, build, and edit URL components and query parameters.
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Cron Builder
Build cron expressions and preview the next run times.
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Color Converter
Convert HEX, RGB, HSL, HSV and generate color palettes.
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Generators(10)
Password Generator
Generate strong passwords with custom length, character types, and live strength meter.
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Passphrase Generator
Create memorable Diceware-style passphrases from random words with custom separators.
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Random Number Generator
Generate random integers or floats in a custom range, single or batch, with no-repeat.
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Random String Generator
Generate random strings with custom character sets, length, and multiple outputs.
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Lorem Ipsum Generator
Generate Lorem Ipsum or Chinese placeholder text by paragraphs, sentences, or words.
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Fake Name Generator
Generate realistic fake names, addresses, and phones for en-US, zh-TW, ja-JP, and more.
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Fake Card Generator
Generate Luhn-valid test credit card numbers for Visa, Mastercard, Amex, and Discover.
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UUID Batch Generator
Generate hundreds of UUID v4 or v7 at once with CSV export and format options.
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Color Palette Generator
Create color palettes — complementary, triadic, analogous, or monochromatic.
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CSS Gradient Generator
Build linear and radial CSS gradients visually with live preview and copy.
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Calculators(10)
View all →BMI Calculator
Calculate your Body Mass Index (BMI) using metric (kg/cm) or imperial (lb/ft/in) units. See your weight category on a color-coded scale — 100% client-side.
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TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and BMR using the Mifflin-St Jeor formula. Get personalized calorie targets for weight loss or muscle gain.
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Loan Calculator
Calculate monthly mortgage or car loan payments and view the full amortization schedule with principal vs interest — instant, 100% private.
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Tip Calculator
Calculate the tip and split the bill evenly among any number of people. Choose from preset percentages or enter a custom rate — instant, no sign-up.
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Age Calculator
Find your exact age in years, months, and days from any birth date. See total days lived, birthday countdown, day of the week you were born — free browser tool.
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Date Difference
Count exact days, weeks, months, or years between any two dates. Toggle business-days-only mode for project planning and deadline tracking — no account needed.
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Percentage Calculator
Three percentage calculators in one: find X% of Y, calculate what percent X is of Y, and compute percentage increase or decrease — instant results, no sign-up.
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Length Converter
Convert between mm, cm, m, km, inches, feet, yards, and miles. Type any value and all other fields update instantly — the fastest free online length converter.
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Weight Converter
Convert between milligrams, grams, kilograms, metric tons, ounces, pounds, stones, and long tons. Enter any value and all others update instantly — free tool.
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Timezone Converter
Convert any date and time across multiple timezones simultaneously. Add as many target zones as needed — ideal for scheduling international meetings and calls.
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Audio Tools(14)
View all →Audio Trimmer
Cut audio to exact start and end points with a visual waveform and precise timing controls.
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Audio Converter
Convert MP3, WAV, OGG, FLAC, and M4A audio files to WAV or OGG/Opus format entirely in your browser — no upload, no account needed.
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Volume Normalizer
Normalize audio loudness with peak or RMS normalization so every clip plays at a consistent volume — 100% client-side, no upload required.
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Tempo Changer
Speed up or slow down any audio file from 0.25× to 4× using the Web Audio API — runs entirely in your browser, no upload or account required.
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Pitch Shifter
Raise or lower the pitch of any audio file by up to 24 semitones using the Web Audio API — runs entirely in your browser, no upload required.
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Voice Recorder
Record voice memos with your microphone and download instantly — nothing leaves your device.
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Tone Generator
Generate sine, square, sawtooth, or triangle tones at any frequency and download as WAV.
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Audio Fade
Add smooth fade-in and fade-out effects to any audio file — linear or equal-power curve, adjustable to the millisecond, no upload required.
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Audio Merger
Concatenate multiple audio clips into one file with an optional gap between them.
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Audio Splitter
Detect silence and automatically split one audio file into multiple downloadable clips.
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MP4 to MP3 Converter
Extract the MP3 audio track from any MP4 or MOV video file at adjustable bitrate using ffmpeg.wasm — fully in your browser, no upload needed.
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FLAC to MP3 Converter
Convert lossless FLAC audio to MP3 at 128–320 kbps using ffmpeg.wasm in your browser. No upload, no account, saves 4–5× storage space.
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WAV to MP3 Converter
Convert WAV audio files to MP3 at 96–320 kbps using ffmpeg.wasm in your browser — no upload, no account, up to 10× smaller file size.
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OGG to M4A Converter
Convert OGG Vorbis or Opus audio to M4A (AAC) for iPhone, iTunes, and QuickTime — runs locally via ffmpeg.wasm, nothing is uploaded.
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Markdown Tools(10)
View all →Markdown to HTML
Convert Markdown text to clean HTML instantly — paste in and copy out.
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HTML to Markdown
Convert HTML source to readable Markdown, preserving headings, links, and lists.
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Markdown Preview
Live side-by-side Markdown editor and rendered HTML preview in your browser.
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Markdown Table Generator
Build Markdown tables visually — enter rows and columns, copy the result.
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Table of Contents Generator
Extract headings from Markdown and generate a linked table of contents.
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Markdown Link Checker
Extract all links from Markdown and verify each URL is reachable.
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Headings Extractor
Extract and outline all heading levels from any Markdown document.
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Markdown Stripper
Remove all Markdown formatting and get clean plain text output.
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Image Link Extractor
Extract all image references from Markdown — see alt text and source URLs at a glance.
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Markdown Word Count
Count words, characters, and reading time for Markdown documents — markup excluded.
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Finance Tools(20)
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Tip Calculator
Calculate tip amount and total per person for any bill size and party.
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Bill Splitter
Split a restaurant or shared bill equally or by custom amounts per person.
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Currency Converter
Convert between 30+ currencies using reference exchange rates — no API needed.
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Savings Goal Planner
Find out how long it takes to reach a savings target with monthly contributions.
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Retirement Planner
Estimate your retirement nest egg based on monthly savings, rate of return, and years to retire.
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Investment Return Calculator
Calculate compound interest and future value of any lump-sum or recurring investment.
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VAT Calculator
Add or remove VAT from any price — supports custom rates for any country.
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Payroll Calculator
Estimate net take-home pay from gross salary after tax rate and deductions.
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Freelance Quote Calculator
Build a client quote from hourly rate, estimated hours, overhead, and desired profit margin.
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Profit Margin Calculator
Calculate gross profit, profit margin percentage, and markup from revenue and cost.
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Compound Interest Calculator
Calculate how investments grow with compound interest — any rate, frequency, and time horizon.
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Mortgage Calculator
Estimate monthly mortgage payments, total interest, and full cost from price, rate, and term.
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Amortization Schedule
Generate a full month-by-month loan repayment table showing principal and interest breakdown.
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Debt Snowball Calculator
Plan debt payoff using the snowball method — smallest balance first, extra payment rolling.
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Emergency Fund Calculator
Find your ideal emergency fund target and how long to build it with monthly savings.
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Rule of 72 Calculator
Estimate years to double your money at any annual return rate — and the reverse.
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Car Lease vs Buy Calculator
Compare total cost of leasing versus financing a car purchase over any time period.
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House Affordability Calculator
Find the maximum home price you can afford based on income, debts, and down payment.
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401(k) Projection Calculator
Project your 401(k) balance at retirement from current savings, contributions, and employer match.
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Inflation Impact Calculator
See how inflation erodes purchasing power — future cost of today's goods and services.
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DevOps Tools(10)
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Dockerfile Linter
Check Dockerfiles for common mistakes, security issues, and best-practice violations.
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NGINX Config Formatter
Format and indent NGINX configuration files for readability.
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.env Formatter
Validate, sort, and format .env environment variable files.
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.htaccess Builder
Generate Apache .htaccess rules for redirects, HTTPS, auth, and more.
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GitHub Actions Linter
Validate GitHub Actions workflow YAML structure and common mistakes.
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SSH Keygen Builder
Build the right ssh-keygen command for RSA, Ed25519, or ECDSA keys.
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Port Reference
Browse and search the well-known port numbers with protocol and service details.
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SSL Cert Decoder
Paste a PEM certificate to decode subject, issuer, and validity dates in your browser.
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DNS Record Builder
Build and format A, AAAA, CNAME, MX, TXT, and other DNS zone file records.
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.gitignore Builder
Select languages and frameworks to generate a combined .gitignore file.
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Time Tools(10)
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Pomodoro Timer
Focus timer using the Pomodoro technique: 25-minute work sessions with 5-minute short breaks.
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Countdown Timer
Set a custom countdown in hours, minutes, and seconds with an audio alarm.
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Stopwatch
Precise stopwatch with lap recording and split times.
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World Clock
See the current time in multiple cities and time zones simultaneously.
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Age Calculator
Calculate exact age in years, months, days, and hours from a birthdate.
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Date Difference
Find the gap between two dates in days, weeks, months, and years.
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Week Number
Find the ISO week number and day of year for any date.
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Business Days Calculator
Add or subtract working days from a date, or count business days between two dates.
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Time Format Converter
Convert between 12-hour and 24-hour time formats instantly.
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Unix Timestamp
Convert between Unix timestamps and human-readable dates with millisecond precision.
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Design Tools(11)
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Color Blind Simulator
Upload an image and see how it appears to people with deuteranopia, protanopia, or tritanopia — 100% client-side.
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Color Contrast Checker
Check WCAG 2.1 contrast ratios between foreground and background colors — instant AA/AAA pass/fail.
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Font Pair Previewer
Pick heading and body fonts from Google Fonts and preview them together with live sample text.
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CSS Shadow Generator
Build box-shadow and text-shadow CSS visually with live sliders — copy the code in one click.
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CSS Clip Path Generator
Create CSS clip-path polygon shapes with an interactive point editor and instant code output.
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SVG Optimizer
Paste or upload SVG files and remove metadata, comments, and whitespace to shrink file size.
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Emoji Favicon Generator
Turn any emoji into favicon-ready PNG files at 16, 32, 48, 64, 128, and 192px — download instantly.
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Icon Resizer
Upload a PNG or SVG icon and download it at multiple sizes — ideal for app icons and favicons.
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Image to Icon Set
Convert any image to a full iOS and Android app icon set — all standard sizes, client-side.
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ASCII Art Banner
Convert text into ASCII art banners with multiple font styles — copy and paste into code or READMEs.
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Favicon Generator
Generate a complete favicon package — 16 PNG sizes, Apple Touch Icon, maskable PWA icon, site.webmanifest, and HTML snippet from one image.
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AI Tools(10)
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AI OCR (Image to Text)
Extract text from images using Tesseract.js — fully in your browser, no upload.
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AI Image Upscaler
Upscale images 2× or 4× using a small ESRGAN model running on your device.
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AI Background Remover
Remove image backgrounds with a u2net ONNX model — runs 100% client-side.
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Text to Speech
Convert text to speech using your browser's built-in Web Speech API voices.
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Speech to Text
Live transcribe your microphone audio with the browser's Web Speech API.
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Sentiment Analysis
Analyze text sentiment with a DistilBERT model via Transformers.js on-device.
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AI Text Summarizer
Summarize long text with a BART model in your browser — opt-in heavy load (~140MB).
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AI Face Blur
Detect and automatically blur faces in photos using MediaPipe — privacy-preserving.
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Keyword Extractor
Extract top keywords from any text with a pure-JS RAKE algorithm — no model needed.
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QR & Barcode Decoder
Decode QR codes and barcodes from images using zxing-js — instant, no upload.
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Games(21)
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Word 5
Guess the daily 5-letter word in 6 tries — green, yellow, gray feedback like a Wordle clone.
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Word Groups
Sort 16 words into 4 hidden groups of 4 — Connections-style daily grouping puzzle.
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Sudoku
Play sudoku in 3 difficulties — fill the 9×9 grid so every row, column, and box has 1–9.
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Word Search
Find all hidden words in a letter grid — drag across letters to circle each word.
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2048
Slide tiles to merge matching numbers and reach the 2048 tile.
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Snake
Classic snake game — eat food, grow longer, avoid the walls and your own tail.
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Tetris
Stack falling tetrominoes to clear lines in this classic block-stacking puzzle.
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Minesweeper
Reveal all safe cells on the grid without triggering a hidden mine.
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Memory Cards
Flip cards two at a time and match all emoji pairs as fast as possible.
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Reaction Time
Test how fast you can react — click the moment the screen turns green.
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Aim Trainer
Train your mouse/touch aim — pop randomly placed targets as fast as you can in 30 seconds.
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Whack-a-Mole
Tap moles popping out of holes for 30 seconds — earn points, avoid the bombs.
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CPS Test
Click speed test — measure your clicks-per-second over 10 seconds, save your best.
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Slide Puzzle
Solve the 15-puzzle — slide tiles into order in the fewest moves possible.
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Tic-Tac-Toe
Play X vs O against an unbeatable AI opponent on a 3×3 grid.
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Connect Four
Drop discs to line up four in a row vs an AI — vertical, horizontal, or diagonal.
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Hangman
Guess the hidden word one letter at a time — 6 wrong guesses and the stick figure swings.
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Typing Test
Measure your typing speed in words per minute with a 60-second WPM test.
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Typing Speed Test
Free online typing speed test — measure your WPM in English, Chinese, Japanese, and Spanish. Track net WPM, raw speed, and accuracy with local score history.
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Conway's Life
Simulate Conway's Game of Life — draw cells and watch patterns evolve.
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Pong
Classic ball-and-paddle arcade game — bounce the ball past the AI opponent.
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Math Tools(10)
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Fraction Calculator
Add, subtract, multiply, and divide fractions. Auto-simplifies to lowest terms.
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Scientific Calculator
Trig, logarithms, square roots, powers, and memory — all in your browser.
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Prime Number Checker
Test whether any number is prime and list all primes up to N.
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Prime Factorization
Find the prime factorization of any positive integer up to 1 trillion. Shows exponential form, flat factor list, and total divisor count. Free, no upload.
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GCD & LCM Calculator
Compute the greatest common divisor (GCD) and least common multiple (LCM) of any two positive integers instantly, free and 100% in your browser.
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Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0 instantly. Shows discriminant, real and complex roots, and step-by-step working. Free, browser-only.
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Matrix Calculator
Add, subtract, multiply 2×2 and 3×3 matrices, plus determinant and inverse.
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Mean, Median & Mode
Calculate mean, median, mode, and range for any dataset of numbers.
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Standard Deviation Calculator
Compute population and sample standard deviation and variance instantly.
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Permutation & Combination
Calculate permutations P(n,r) and combinations C(n,r) for any n and r up to 170. Free online calculator for combinatorics, statistics, and exam prep.
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Accessibility Tools(10)
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Color Blind Test
Simulate how your palette looks to people with protanopia, deuteranopia, tritanopia, and achromatopsia.
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WCAG Contrast Checker
Check foreground/background color contrast ratio against WCAG AA and AAA thresholds.
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Alt Text Generator
Generate descriptive alt text suggestions from an image filename or URL path.
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Screen Reader Preview
Paste HTML and see a simplified linearised read-order that a screen reader would announce.
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Keyboard Nav Tester
Interactive checklist and live keyboard-event recorder to audit keyboard accessibility.
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Focus Order Viewer
Paste HTML and get a numbered list of focusable elements in their natural tab order.
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ARIA Cheat Sheet
Searchable reference of all WAI-ARIA roles, states, and properties with usage examples.
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HTML Landmark Checker
Paste HTML and check for proper landmark regions: main, nav, header, footer, aside.
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Motion Reduce Preview
Preview how CSS animations look with prefers-reduced-motion: reduce applied.
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Font Size Tester
Preview custom text at any font size to verify readability for low-vision users.
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Crypto & Encoding(10)
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Bcrypt Hash Generator
Hash passwords with the bcrypt algorithm using a custom cost factor — all computed in your browser.
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HMAC-SHA256 Generator
Compute HMAC-SHA256 message authentication codes with a secret key using the Web Crypto API.
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Base32 Encoder / Decoder
Encode and decode text using Base32 (RFC 4648) — used in TOTP authenticators and DNS labels.
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ROT13 Cipher
Apply ROT13 substitution cipher — rotate letters by 13 positions. Applying it twice restores the original.
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Caesar Cipher
Encode and decode text with the classical Caesar shift cipher using a custom shift amount (1–25).
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Atbash Cipher
Encode and decode text with the Atbash cipher — mirror the alphabet so A↔Z, B↔Y, C↔X, etc.
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Morse Code Translator
Convert text to Morse code dots and dashes or decode Morse code back to plain text instantly.
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Binary ↔ Text Converter
Convert plain text to binary (0s and 1s) and back. Each character becomes its 8-bit ASCII value.
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Hex ↔ ASCII Converter
Convert text to hexadecimal representation and decode hex strings back to readable ASCII text.
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ASCII Art Text Generator
Turn any text into large block-letter ASCII art using a built-in 5-row banner font.
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Pick & Random(11)
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Wheel of Names
Enter any list of names and spin a randomized wheel to pick a winner.
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Lottery Number Picker
Generate random numbers for 大樂透, 威力彩, 今彩539, and custom lotteries.
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Coin Flip
Flip a virtual coin — tap or press Space to flip, shareable result via URL.
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Dice Roller
Roll any dice with D&D notation: 2d6, 1d20, 4d10+5 — mobile shake to reroll.
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Yes / No Decider
Get an instant yes or no answer — tap to flip the card, share result by URL.
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Team Picker
Paste a list of names and split them into balanced random teams instantly.
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Restaurant Picker
Can't decide where to eat? Add your options and let the picker choose for you.
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Random Emoji
Generate one or more random emoji — filter by category, copy to clipboard.
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Random Color
Generate random colors in HEX, RGB, and HSL — lock individual channels.
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List Shuffler
Paste any list and shuffle the order randomly — great for raffle draws.
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Love Language Quiz
Discover your primary love language — 12 questions, instant results, shareable link, no email.
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Health & Fitness(14)
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BMR Calculator (Mifflin)
Calculate your Basal Metabolic Rate and daily calorie needs using the Mifflin-St Jeor equation.
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Body Fat Calculator
Estimate body fat percentage using the US Navy measurement method.
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Ideal Weight Calculator
Find your ideal body weight range using Devine, Robinson, Miller, and Hamwi formulas.
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Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity level.
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Pregnancy Due Date
Calculate your estimated due date from your last menstrual period using Naegele's rule.
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Pregnancy Due Date Calculator — Week by Week
Calculate your estimated due date from your last menstrual period (LMP) and see a full 40-week pregnancy milestone timeline. Free, private, no signup.
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Ovulation Calculator
Estimate your ovulation date and fertile window based on your last period and cycle length.
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Heart Rate Zones
Calculate your five cardio training heart rate zones from your age and resting heart rate.
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Sleep Cycle Calculator
Find the best bedtime or wake time to complete full 90-minute sleep cycles.
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16:8 Intermittent Fasting Timer
Free live countdown timer for 16:8 intermittent fasting. Set your last meal time and track your fasting and eating windows — no signup, no app, 100% private.
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Calorie Burn — Walking
Estimate calories burned walking based on your weight, pace, and duration.
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Macro Split Calculator
Break daily calories into protein, carbs, and fat grams for your fitness goal.
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Keto Macro Calculator — Grams per Meal
Free keto macro calculator. Enter your stats and get daily protein, fat, and net carbs in grams — split across 2, 3, 4, or more meals. No signup.
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Intermittent Fasting Timer — 16:8, 18:6, OMAD
Free intermittent fasting timer for 16:8, 18:6, 20:4, and OMAD. Live countdown, session history, and browser notifications — no signup, 100% private.
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Sport & Fitness(12)
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Running Pace Calculator
Convert between pace (min/km) and speed (km/h), and calculate total run time from distance and time.
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Running Pace Calculator — Miles & km Splits
Calculate running pace in min/km and min/mile with a side-by-side split table. Export splits to CSV for Garmin or any training log. Free, 100% client-side.
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Running Pace Converter — min/mile to min/km
Convert running pace from min/mile to min/km instantly. See treadmill speed and projected finish times for 5K, 10K, half, and full marathon at your pace.
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Marathon Time Predictor
Predict your marathon or half-marathon finish time from a recent race result using Riegel's formula.
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Swim Pace Calculator
Calculate swim pace per 100 m, total session time, and distance from any combination of inputs.
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Cycling Power Estimator
Estimate watts needed to hold a given speed at your weight and road gradient.
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One-Rep Max Calculator
Estimate your one-rep max for any lift using the Epley, Brzycki, and Lombardi formulas.
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Training Load Calculator
Calculate session RPE training load (duration × RPE) to track weekly stress and recovery balance.
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VO₂ Max Estimator
Estimate your VO₂ max from resting and maximum heart rate — no lab or field test required.
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Gym Rest Timer
Countdown timer for rest periods between sets — audio alert when time is up.
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Workout Builder
Build and print a workout plan: add exercises with sets, reps, and rest targets.
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Sleep vs Recovery Score
Score your recovery readiness based on sleep hours and the prior session training load.
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Network Tools(10)
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IP / CIDR Calculator
Calculate network address, broadcast address, host range, subnet mask, and usable host count from any IPv4 CIDR notation — instant, browser-based.
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Subnet Calculator
Divide a network into equal subnets — enter a base CIDR and desired subnet count to get the full network, host range, and broadcast for each subnet.
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MAC Vendor Lookup
Identify the hardware manufacturer behind any MAC address by looking up the OUI prefix — works on any format: colon, dash, or plain hex.
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Ping Output Explainer
Paste ping command output and get a plain-English breakdown of RTT, TTL, packet loss, and what each value means — supports macOS, Linux, and Windows.
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Traceroute Explainer
Paste traceroute output and decode every hop: RTT latency, asterisks meaning ICMP blocked, firewall indicators, and routing anomalies explained.
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Port Number Lookup
Look up any TCP/UDP port number to see its standard service name, protocol, and common use cases — covers well-known, registered, and dynamic ranges.
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HTTP Headers Decoder
Paste raw HTTP request or response headers and get a parsed, human-readable table with field descriptions — 100% client-side.
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SSL/TLS Grade Info
Understand SSL Labs grades A+ to F — see exactly what TLS version support, cipher suites, HSTS, and certificate issues affect your score.
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DNS Record Explainer
Select any DNS record type — A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, PTR, SRV — and get a detailed explanation with examples.
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WHOIS Formatter
Paste raw WHOIS output and get a clean, structured table showing domain name, registrar, creation date, expiry date, status, and name servers.
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Color Tools(10)
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HEX to RGB Converter
Convert hexadecimal color codes to RGB values — get r, g, b components and the CSS rgb() string.
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HEX to HSL Converter
Convert hex colors to HSL (hue, saturation, lightness) for easier theming and CSS variables.
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Color Mixer
Blend two colors together at any ratio and see the resulting hex, RGB, and HSL values instantly.
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Complementary Color Finder
Find the complementary color (180° opposite on the color wheel) for any hex color.
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Analogous Colors Generator
Generate analogous color schemes (±30° and ±60° on the color wheel) for harmonious palettes.
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Triadic Colors Generator
Generate triadic color schemes — three colors evenly spaced 120° apart on the color wheel.
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Tints & Shades Generator
Generate a full range of tints (lighter) and shades (darker) for any base color.
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Color Name Lookup
Find the nearest CSS named color for any hex value, or search by color name to get the hex code.
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CSS Variable Extractor
Paste CSS code to extract all custom properties (--variables) and their values in one click.
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Color from Image Pixel
Upload an image and click any pixel to instantly read its hex, RGB, and HSL color value.
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Format & Validate(13)
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Phone Number Formatter
Format phone numbers into E.164, international, and national styles. Supports 15 country codes — US, UK, DE, JP, CN and more. Free, client-side tool.
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Address Formatter
Format postal addresses into multi-line and single-line layouts from individual fields. Works for any country convention. 100% client-side, nothing uploaded.
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VAT Number Validator
Validate EU VAT numbers against official format patterns for 27 member states — identifies the issuing country and normalises the format. Free, client-side.
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IBAN Validator
Validate IBAN bank account numbers using ISO 7064 MOD-97-10 checksum verification and country-specific length rules. Free, instant, client-side.
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Credit Card Formatter
Format credit card numbers with standard spacing, auto-detect card network (Visa, Mastercard, Amex), and validate the Luhn checksum. Free, client-side.
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SSN Masker
Mask US Social Security Numbers showing only the last 4 digits. Outputs standard dashes, X-replaced, and last-4-only formats — safe for display and logging.
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Name Formatter
Format personal names into full name, last-first order, initials, and formal salutation from individual components — title, first, middle, last, suffix.
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Money Formatter
Format monetary amounts with currency symbols, thousand separators, and accounting notation. Supports 15 major currencies including USD, EUR, GBP, JPY.
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Scientific Notation Formatter
Convert numbers to scientific notation, E notation, and engineering notation with configurable significant figures. Works with very large and very small values.
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Date ISO Formatter
Parse any date string and convert it to ISO 8601, UTC, Unix timestamp, and human-readable formats. Supports dozens of input formats. Free and client-side.
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XML to YAML Converter Online
Convert XML to YAML online in your browser — attributes become @attr keys, arrays auto-detected. 100% client-side, no upload, no signup required.
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Excel to Markdown Table for Notion
Convert Excel or CSV to Markdown table for Notion, Obsidian, or GitHub. Handles merged cells, auto-aligns numeric columns. 100% client-side — no upload, no signup.
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YAML to Properties Spring Boot
Convert Spring Boot application.yml to application.properties online — nested keys become dot-separated, arrays use [n] indexing, multi-doc YAML supported. 100% client-side, no upload.
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Music Tools(15)
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Song BPM Finder by Tapping
Tap along to any song to find its BPM instantly. Rolling average, history log, and copy-to-DAW format — free, offline, no upload.
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BPM Tap Tempo
Tap any button or key to calculate BPM instantly — perfect for DJs, producers, and musicians who need to match tempo without a metronome.
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Online Metronome
Free online metronome from 20–300 BPM with a visual beat indicator and accent on beat 1 — works in any modern browser, no plugin or download needed.
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Chord Finder
Find the notes and intervals for any chord instantly — major, minor, 7th, diminished, augmented, and more, all in your browser without signup.
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Scale Builder
Build major, minor, harmonic minor, pentatonic, blues, and all 7 modal scales — see every note name and semitone interval for any root note, instantly.
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Online Tuner (A=440 Hz)
Reference pitch tuner at A4=440 Hz — play any note from C1 to B7 for tuning guitar, bass, violin, piano, and other instruments directly in your browser.
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Interval Trainer
Learn and identify musical intervals — hear perfect, major, minor, augmented, and diminished intervals played back using Web Audio in your browser.
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Note Frequency Calculator
Calculate the frequency in Hz and MIDI note number for any musical note across all octaves — uses the A4=440 Hz equal temperament standard, browser-based.
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Time Signature Counter
Count beats in 4/4, 3/4, 2/4, 6/8, 5/4, and 7/8 time signatures with a visual beat indicator — set BPM and practice counting or conducting.
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Key Transposer
Transpose chord progressions and song keys up or down any number of semitones — paste your chords and use the semitone presets for instant key changes.
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Rhythm Note Calculator
Calculate note durations in milliseconds and seconds for any BPM — whole, half, quarter, eighth, and sixteenth notes, ideal for delay and reverb settings.
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WAV to MP3 Converter — No Upload
Convert WAV files to MP3 entirely in your browser — no upload, no server, no file size cap. Pick your bitrate and download your MP3 offline in seconds.
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MP3 Cutter — Free, No Upload
Cut and trim MP3 files in your browser with waveform preview, fade in/out, and an iPhone ringtone 39 s preset. 100% client-side — no upload, no server, no size limit.
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WAV to MP3 Converter No Upload
Convert WAV to MP3 in your browser — no upload, no server, no file size cap. FFmpeg WebAssembly runs locally. Choose 128, 192, or 320 kbps.
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Voice Changer Online — No Upload
Change your voice online with pitch shift, reverb, echo, and robot effects. No upload, no signup — 100% client-side Web Audio API. Works on MP3, WAV, and more.
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Code Tools(16)
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Code Snippet Formatter
Paste HTML, CSS, or JavaScript and get cleanly indented, formatted output in one click.
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Regex Cheat Sheet
Interactive regular expression reference — click any pattern to copy it, with a live test input.
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CSS Grid Builder
Visually configure a CSS Grid layout and copy the generated CSS — columns, rows, gap, and placement.
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CSS Flexbox Builder
Set flexbox container and item properties visually, preview the result, and copy the CSS.
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CSS Breakpoint Tester
See which CSS breakpoint is active at the current viewport width — Tailwind, Bootstrap, or custom.
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Lorem Image URL Builder
Generate placeholder image URLs from Picsum, Placehold.co, and via.placeholder with custom sizes.
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Placeholder Image Generator
Generate a placeholder image at any size with custom colors and label text — download as PNG.
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Emoji Cheat Sheet
Browse and search all standard emoji with Unicode codepoints and HTML entities. Click to copy.
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ASCII Table
Full ASCII character table with decimal, hex, octal, binary, and HTML entity values. Click to copy.
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HTTP Methods Reference
Quick reference for HTTP methods (GET, POST, PUT, PATCH, DELETE) with semantics and common status codes.
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Barcode Generator
Generate Code128, EAN-13, UPC-A, and Code39 barcodes as SVG/PNG entirely in your browser.
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JWT Decoder & Verifier
Decode JWT tokens and verify signatures in your browser. Inspect header, payload, and claims. Verify HMAC, RSA, and ECDSA signatures. 100% private.
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UUID v7 Decode Bit Inspector
Decode UUID v1/v4/v6/v7/v8 into a color-coded 128-bit RFC 9562 field map. Bulk paste with timeline scatterplot and monotonic-order check.
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llms.txt Validator
Validate your llms.txt file against the official spec. Check H1, sections, Markdown link format, and structure — 100% client-side, no upload.
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DOT to ASCII Graphviz Converter
Convert Graphviz DOT language graphs to ASCII art in your browser. Choose dot, neato, or fdp layout engine and copy the result. 100% client-side.
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Objective-C to Swift Converter
Convert Objective-C to Swift 5.9 online — NS* types, @property, class interfaces, and message sends translated instantly. 100% client-side, no upload needed.
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Home & DIY(10)
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Paint Calculator
Calculate how many gallons of paint you need for walls and ceilings by room dimensions.
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Wallpaper Calculator
Find out how many rolls of wallpaper you need based on room dimensions and pattern repeat.
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Tile Calculator
Calculate tile quantity for floors or walls with adjustable waste factor.
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Lawn Fertilizer Calculator
Calculate how many bags of fertilizer you need based on lawn area and product coverage.
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Room Area Calculator
Calculate floor, wall, and ceiling area for rectangular or L-shaped rooms.
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Ceiling Fan Size Guide
Find the right ceiling fan blade span for your room size and ceiling height.
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AC BTU Calculator
Calculate the BTU capacity needed to cool a room based on size and sun exposure.
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Electricity Cost Estimator
Estimate monthly electricity cost for any appliance by wattage, daily hours, and rate.
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Water Bill Estimator
Estimate your monthly water bill from showers, laundry, dishwasher, and outdoor use.
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Plant Watering Schedule
Build a weekly watering calendar for all your houseplants based on watering frequency.
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Car & Vehicle Tools(10)
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Fuel Economy Calculator
Calculate fuel economy in MPG and L/100km from distance driven and fuel used. Works with miles/gallons or km/litres.
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MPG ↔ L/100km Converter
Convert miles per gallon (US or Imperial) to litres per 100 km and back. Instant two-way conversion.
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Trip Fuel Cost Calculator
Calculate how much fuel your trip will cost. Enter distance, fuel economy, and price per litre or gallon.
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Parking Fee Calculator
Calculate parking fees from hourly rates with optional daily cap. Enter rate and duration to see total cost.
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Road Trip Budget Planner
Plan your road trip budget covering fuel, food, lodging, and other daily expenses for full trip estimate.
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Tire Size Converter
Decode tire sizes like 205/55R16 to actual diameter, section width, sidewall height, and circumference.
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Oil Change Cost Estimator
Estimate oil change costs for DIY and shop service. Compare conventional, synthetic blend, and full synthetic.
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Car Depreciation Estimator
Estimate your car's value after 1–10 years using declining-balance depreciation with an annual rate.
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EV Charging Cost Calculator
Calculate electric vehicle charging costs for home and public stations. Enter battery size, rate, and efficiency.
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License Plate Format Reference
Look up license plate formats for US states and countries. Shows format, character count, and example plates.
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Pet Care Tools(11)
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Dog Age in Human Years
Convert your dog's age to human equivalent years, adjusted for breed size.
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Cat Age in Human Years
Find out how old your cat is in human years using the standard feline aging formula.
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Dog Food Portion Calculator
Calculate daily kibble portions for your dog by weight, activity level, and life stage.
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Cat Food Portion Calculator
Find the right daily feeding amount for your cat based on weight, lifestyle, and life stage.
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Pet Body Condition Score
Check if your dog or cat is underweight, ideal, or overweight by comparing current and ideal weight.
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Pet Vaccination Schedule
Generate a recommended vaccination timeline for your dog or cat based on age and life stage.
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Pet Budget Calculator
Estimate monthly and annual pet care costs — food, vet, grooming, insurance, and supplies.
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Dog & Cat Breed Info
Look up size, lifespan, exercise needs, and grooming requirements for popular dog and cat breeds.
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Pet Medication Dose Guide
Weight-based dosing reference for common dog and cat medications. Always confirm with your vet.
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Pet Name Generator
Generate unique pet names for dogs, cats, and small animals — cute, cool, or classic styles.
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Dog Age in Human Years by Breed Size
Convert dog age to human years using AVMA size curves for toy, small, medium, large, and giant breeds. Breed lookup included — free browser tool, no data sent.
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Miscellaneous Tools(11)
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Barcode Generator
Generate Code 128 barcodes for any text or number string. Download as PNG — 100% client-side.
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ISBN Validator
Validate ISBN-10 and ISBN-13 numbers, check the checksum digit, and convert between formats.
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License Plate Format by Country
Look up license plate formats, character rules, and example plates for countries worldwide.
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ZIP / Postal Code Format by Country
Look up postal code formats and regex patterns for countries worldwide. Validate any postal code.
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Bra Size Converter
Convert bra sizes between US, UK, EU, FR/BE, AU/NZ, and IT sizing systems instantly.
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Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM for men and women across all major standards.
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Ring Size Converter
Convert ring sizes between US, UK, EU (circumference), and JP standards, or measure from diameter.
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Hat Size Converter
Convert hat sizes between US, UK, and EU standards, or calculate your size from head circumference.
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Gear Ratio Calculator
Calculate gear ratio, output RPM, torque multiplication, and speed from gear teeth counts.
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Weather Unit Converter
Convert weather measurements: temperature, pressure, wind speed, visibility, and dew point between units.
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YouTube Thumbnail Downloader
Download any YouTube video thumbnail in all available resolutions — Max HD, SD, HQ — directly in your browser. No upload, no login required.
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Fun & Party Tools(12)
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Clean Insult Generator
Get a random safe-for-work, silly roast for friends and office banter. 50+ PG-rated insults — nothing offensive — completely free and private.
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Compliment Generator
Generate a warm, genuine random compliment to make someone smile. 50+ unique phrases, completely free, no signup required, and nothing leaves your browser.
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Fortune Cookie
Crack open a digital fortune cookie for a random proverb, prediction, or life tip. 50+ unique fortunes, free, no signup, 100% client-side.
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Would You Rather
Spark debates and laughter with random Would You Rather dilemmas for groups. 40+ unique questions for party games and icebreakers, free and instant.
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Truth or Dare
Draw random truth questions or dare challenges for your party or game night. 25 truths, 25 dares, safe for teens and adults, free and instant.
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Never Have I Ever
Generate random Never Have I Ever statements for party games and icebreakers. 50+ prompts, family-friendly, completely free and nothing is uploaded.
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Magic 8 Ball
Ask the digital Magic 8 Ball any yes/no question and receive a mystical answer. 20 classic responses, free, no signup, runs in your browser.
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Flip a Coin
Flip a virtual coin to decide between two options — heads or tails — instantly in your browser. Tracks flip history and is completely free.
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Fantasy Name Generator
Generate unique elf, dwarf, wizard, or orc names for D&D, RPGs, and stories. Thousands of combinations, free, no signup, fully client-side.
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Story Prompt Generator
Get a random creative writing prompt by genre — fantasy, sci-fi, romance, thriller, horror, and comedy. 60+ prompts, free, no signup required.
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Username Generator
Generate 50 unique usernames per click across gamer, aesthetic, professional, and cute presets. Leet speak option included — free, instant, no signup required.
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Magic 8 Ball Online
Ask the Magic 8 Ball Online any yes or no question and get one of 20 classic answers instantly. 3D shake animation, sound toggle, answer history. Free, no signup — 100% in your browser.
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Advanced Time Tools(10)
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Multiple Timers
Run several countdown timers simultaneously — each with its own label, duration, and alarm.
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Multiple Alarms
Set multiple alarms with custom labels. Fires an audio beep when each alarm time is reached.
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Stopwatch with Laps
Stopwatch with full lap and split recording — track splits, best lap, and average pace.
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World Meeting Finder
Find a meeting time that works across multiple time zones — see overlapping business hours at a glance.
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Days Until Event
Count down the exact days, hours, and minutes until any upcoming date or event.
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Public Holidays by Country
Browse public holidays for 30+ countries by year — US, UK, Japan, India, Australia and more. See exact dates and weekdays. 100% free, no signup.
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Business Hours Overlap
See when your business hours overlap with offices in other time zones — plan international calls.
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Sunrise & Sunset Calculator
Calculate sunrise, sunset, solar noon, and day length for any date and geographic location.
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Lunar Calendar & Moon Phase
View the current lunar phase, moon age, next full moon, and a monthly moon phase calendar.
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Week of Year Calendar
Jump to any ISO week number and see its start and end dates — ideal for project planning.
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Share & Link Tools(10)
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URL Shortener Info
Identify URL shortener services and inspect shortened link structures before clicking.
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QR Share Link
Generate a QR code for any URL so others can scan and open it on mobile instantly.
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Share Image Builder
Build a branded social share image with title, subtitle, and URL on a canvas.
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Social Share Link Builder
Generate one-click share links for Twitter/X, Facebook, LinkedIn, WhatsApp, and Telegram.
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Embed Code Builder
Build responsive iframe embed code for any URL with custom width, height, and sandbox rules.
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Link Preview Tester
Simulate how a link looks in social media previews by entering OG title, description, and image.
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Mailto Link Builder
Build mailto: links with to, cc, bcc, subject, and body fields pre-filled.
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SMS Link Builder
Build sms: links with a pre-filled message body for click-to-text on mobile.
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WiFi Share QR
Generate a QR code for your WiFi network so guests can connect without typing the password.
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Contact vCard Builder
Build a vCard 3.0 contact file with name, phone, email, and address for easy sharing.
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Why browser-only tools?
Most online image tools require uploading your files to a remote server. That works, but it puts your photos — and any embedded data like GPS coordinates, device metadata, or timestamps — outside your control. The tools on this site use modern browser APIs (Canvas, Web Workers, Blob, FileReader) to do all processing on your device. Your files stay local; you keep the original; nothing is logged.
That same approach makes the tools fast on mobile: no upload wait, no download wait, and they keep working with no signal. Every page is mobile-first, with large tap targets, drag-and-drop on desktop, and clean output ready to share.
Frequently Asked Questions
- Are my files uploaded anywhere?
- No. Every tool here runs 100% inside your browser using the Canvas API and JavaScript. Files never reach a server, account, or cloud — your originals stay on your device.
- Do these tools work on iPhone and Android?
- Yes. All tools are mobile-first and work in Safari, Chrome, and Firefox on both iOS and Android. No app install required.
- Is it free? Any signup or watermark?
- Completely free with no signup, no usage limits, and no watermarks added to your files (you can add your own watermark with the Watermark tool).
- Why use a browser tool instead of an app?
- Browser tools install nothing, claim no permissions, and process files locally. There is no app store review, no background data collection, and no risk of your photos being silently uploaded to a third-party server.
- Which tool should I use for social media posts?
- Use the Resizer for Instagram, Twitter, or Facebook dimensions, the Compressor to keep files under upload limits, and the Watermark tool to brand photos before sharing.