Free tools, fast and private
A growing set of developer & utility tools, running 100% in your browser. No tracking. No ads. Just useful tools.
Developer tools
JS Beautify
Format JS / HTML / CSS.
JS Obfuscator
Obfuscate JavaScript code.
SQL Formatter
Format and beautify SQL across PostgreSQL, MySQL, SQLite, BigQuery, Snowflake, Redshift, T-SQL. Keyword case and indent.
XML Formatter
Pretty-print or minify XML with parser validation. Adjustable indent, preserves CDATA.
CSS Minifier
Minify or beautify CSS. Strips comments and whitespace, preserves strings, urls and important /*! comments.
HTML Minifier
Safely minify HTML. Strips comments, collapses whitespace, preserves pre / textarea / script / style.
JWT Debugger
Decode JWT header & payload, verify HS256/384/512.
JWT Secret Key Generator
Generate secure JWT secret keys for HS256, HS384, HS512.
Regex Tester
Test JavaScript regex with live match highlighting.
OG Tag Checker
Inspect Open Graph, Twitter Card and JSON-LD of any URL.
Curl to Code
Convert curl commands into fetch / axios / Python.
MIME Type Lookup
Search MIME / content types by file extension. Grouped by Web, Image, Audio, Video, Font, Archive, Document.
Base64 Converter
Encode & decode Base64 text with full UTF-8 support.
URL Encoder & Decoder
encodeURIComponent / decodeURIComponent with batch mode.
HTML Entities
Encode & decode HTML entities.
Bookmarklet Builder
Wrap a JavaScript snippet into a javascript: bookmarklet URL.
Morse Code Translator
Text ↔ Morse with adjustable WPM audio playback and configurable frequency. ITU reference table.
ROT13 / Caesar Cipher
Encode and decode ROT13 and any Caesar shift 1-25. Auto-crack ciphertext with chi² English frequency analysis.
Binary ↔ Text Converter
Encode and decode binary using UTF-8. Handles every Unicode character including Vietnamese accents.
NATO Phonetic Alphabet
Translate text to NATO phonetic spelling (Alfa, Bravo, Charlie…) and back. Useful for phone/radio dictation.
Generators
Coin Flip
Flip a coin with a 3D animation.
Dice Roller
Roll d4,d20 dice with animation.
Wheel of Names
Spin a wheel to pick a random name.
Random Number Generator
Random numbers in a custom range.
Random Team Picker
Shuffle and split a roster of names into balanced teams or groups.
List Shuffler
Randomly reorder a list using Fisher-Yates. Pick random items or sort A-Z.
Fake Credit Card Generator
Generate Luhn-valid test credit card numbers (Visa, Mastercard, Amex, Discover, JCB, UnionPay). For form testing only.
Random Quote Generator
Inspirational, tech, wisdom and humor quotes. Copy, share, or tweet directly.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words.
Fake Data Generator
Generate fake users, addresses, profiles.
Name Generator
Random names from 12 countries, filter by gender.
Fancy Text
Unicode font styles for Instagram, Twitter...
Zalgo / Glitch Text
Generate creepy glitch text by stacking combining diacritics. Calm / moderate / chaos presets.
Lorem Picsum Placeholder Images
Generate placeholder image URLs from picsum.photos. Custom size, blur, grayscale, seed, JPEG or WebP.
QR Code Generator
Generate QR codes with custom colors, ECC, logo.
VietQR Payment Generator
Payment QR for 60+ Vietnamese banks with amount, memo, and account name.
Meta Tag Generator
Open Graph, Twitter Card and SEO meta tags.
Campaign URL Builder
UTM URL builder for marketing campaigns.
Email Signature Generator
HTML email signature builder.
Mailto Builder
Build a mailto: link with To, Cc, Bcc, subject and pre-filled body.
CSS Gradient
Linear & radial CSS gradient builder.
Box Shadow
Visual CSS box-shadow builder.
Color Palette Generator
Generate analogous, complementary, triad, tetrad, monochrome or random palettes. Lock colors and export CSS / JSON.
CSS clip-path Maker
Visual polygon editor for CSS clip-path. Drag points on a grid, 12 shape presets, export CSS.
Converters
Calculators
Tip Calculator
Split a restaurant bill, tip percentage, party size, per-person share.
Loan / EMI Calculator
Monthly mortgage / loan EMI, total interest, amortization schedule.
Discount Calculator
Sale price calculator, discount %, optional tax, savings, final price, effective discount.
VAT / Sales Tax Calculator
Add VAT to a net price or extract VAT from a gross price. Preset rates for Vietnam, US, UK, EU, Australia, Japan, Singapore, Canada.
ROI & CAGR Calculator
Investment return calculator, net gain, total ROI %, annualized return (CAGR). Multi-currency.
Editors & viewers
Image Palette Extractor
Extract dominant colors from an image.
QR Code Reader
Decode QR codes from images or camera.
Add Background to Screenshot
Wrap a screenshot in macOS window chrome and a gradient background. Adjust padding, export PNG.
Image Resizer
Resize JPG, PNG, WebP entirely in your browser. Lock aspect ratio, output PNG/JPEG/WebP. No upload.
Image Compressor
Compress JPG, PNG, WebP locally in the browser. Quality slider, optional max width, side-by-side before/after.
Utilities
Pomodoro Timer
25-min focus + 5-min short break + 15-min long break cycle with browser notifications.
Chronometer / Stopwatch
Online stopwatch with lap times, accurate to 1/100s. Immersive fullscreen mode.
Countdown Timer
H/M/S countdown with bell, beep, chime, alarm preset or your own uploaded sound.
Date Countdown
Live countdown to any future date.
Timezone Converter
Compare current time across timezones.
Sleepytime, Sleep Cycle Calculator
Find the best bedtime or wake time based on 90-minute REM sleep cycles.
Digital Clock
Large fullscreen digital clock with 5 templates (mono, neon, minimal, flip, LED). Great for events, classrooms, OBS overlays.
Alarm Clock
Multiple labeled alarms with browser notifications. Runs in background tab.
Online Metronome
Practice metronome with Web Audio scheduler, tap tempo, customizable beats per bar (BPM 30-260).
Word Counter
Count words, characters, sentences, and reading time.
Typing Speed Test (WPM)
Measure your typing speed (words per minute), accuracy and error rate over 60 seconds.
Emoji Picker
Search and copy Unicode emojis by name, slug or category. Recently used list.
Kaomoji Picker
Browse text emoticons like ¯\_(ツ)_/¯.
Tally Counter
Multiple labeled click counters with reset. Keyboard +/- shortcuts.
Text to Speech (TTS)
Read text aloud in 22 countries via Google Translate TTS or offline browser voices.
Scoreboard
Track scores for sports, board games, classrooms. Multi-team with leading badge, saved locally.
Mirror & Upside-down Text
Reverse text, flip upside-down with Unicode lookalikes (ɥǝllo), or mirror each line.
Character Frequency Analyzer
Count and rank every character. Case and whitespace toggles. Visual bar chart.
Speech to Text Dictation
Live voice typing via Web Speech API. 14 languages including Vietnamese, English, Japanese, Korean.