JSON Formatter
Beautify, minify, validate and explore JSON with syntax highlighting and tree view.
Free Online Developer Tools
55 fast, browser-based tools for developers, designers and everyone — formatters, converters, generators and more.
⚡ Instant🔒 100% private🆓 Free, no sign-up📡 Works offline
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Base64 Text Encode/Decode
Encode or decode any text to and from Base64.
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
URL Encode/Decode
Percent-encode or decode URLs and query strings.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.
Regex Tester
Test regular expressions with real-time match highlighting.
UUID Generator
Generate random UUIDs (v4) in bulk with one click.
Unix Timestamp Converter
Convert Unix timestamps to human dates and vice versa.
Password Generator
Generate strong, customizable passwords with entropy estimation.
Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
Encoders / Decoders
Base64 to Image
Decode Base64 strings and preview them as images instantly.
Image to Base64
Convert images to Base64 encoded strings for embedding.
Base64 Text Encode/Decode
Encode or decode any text to and from Base64.
URL Encode/Decode
Percent-encode or decode URLs and query strings.
HTML Entity Encode/Decode
Convert special characters to HTML entities and back.
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
Formatters
JSON Formatter
Beautify, minify, validate and explore JSON with syntax highlighting and tree view.
XML Formatter
Pretty-print and validate XML documents.
SQL Formatter
Format and beautify SQL queries for readability.
CSS Formatter
Beautify or minify CSS stylesheets.
HTML Formatter
Beautify or minify HTML markup.
Markdown Preview
Write Markdown and preview the rendered HTML live.
Generators
Password Generator
Generate strong, customizable passwords with entropy estimation.
Random Text Generator
Generate lorem ipsum or random placeholder text.
UUID Generator
Generate random UUIDs (v4) in bulk with one click.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.
QR Code Generator
Generate QR codes from text, URLs, or any data.
Slug Generator
Convert any text into URL-friendly slugs.
Converters
Color Picker
Pick colors and convert between HEX, RGB, and HSL formats.
Image Converter
Convert images between PNG, JPG, and WebP formats.
Image Compressor
Compress PNG/JPG images right in the browser.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Unix Timestamp Converter
Convert Unix timestamps to human dates and vice versa.
CSV ↔ JSON Converter
Convert between CSV and JSON formats instantly.
Unit Converter
Convert between length, weight, temperature, and more.
Testers / Validators
Text Tools
Word Counter
Count words, characters, sentences, and estimate reading time.
Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
Text Diff Checker
Compare two texts and highlight the differences.
String Utilities
Reverse, trim, repeat, pad, and manipulate strings.
Find & Replace
Find and replace text with regex support and live preview.
Text to Speech
Convert text to spoken audio using your browser's speech engine.
Speech to Text
Transcribe spoken words to text using your microphone.
Design Tools
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor.
Box Shadow Generator
Visually create CSS box-shadow effects and copy the code.
Color Palette Generator
Generate harmonious color palettes from a base color.
Font Pair Preview
Preview Google Font pairings for your next project.
Aspect Ratio Calculator
Calculate and resize dimensions while keeping aspect ratio.
Image Cropper
Crop images to exact dimensions or aspect ratios.
Utility Tools
Stopwatch & Timer
Precise stopwatch with lap times and countdown timer.
Pomodoro Timer
Focus timer with customizable work/break intervals.
Online Notepad
Quick notepad that auto-saves to your browser.
Screen Resolution Info
View your screen resolution, pixel ratio, and viewport size.
Scientific Calculator
Full scientific calculator with history and keyboard support.
Percentage Calculator
Calculate percentages, increases, decreases, and ratios.
Tip Calculator
Calculate tip and split bills among friends.
BMI Calculator
Calculate your Body Mass Index with metric and imperial units.
Age Calculator
Calculate exact age in years, months, days from a birth date.
Fun / Misc
Coin Flip
Flip a virtual coin — heads or tails with animation.
Dice Roller
Roll one or more dice with customizable sides.
Random Number Generator
Generate random numbers within a custom range.
Color Blindness Simulator
See how colors appear under different types of color blindness.
Morse Code Translator
Translate text to Morse code and back, with audio playback.