Developer tools that stay in your browser
45 quick utilities for formatting, converting, encoding and generating. No sign-up, no uploads: your data never leaves this page.
Most popular
JSON Formatter
Format, validate and minify JSON
QR Code Generator
QR codes for links, text and Wi-Fi
Password Generator
Strong random passwords
Base64
Encode and decode Base64
Word Counter
Count words, characters and more
Image Converter
Convert and resize PNG, JPEG, WebP
Diff Checker
Compare two texts line by line
Percentage Calculator
Percent of, change and ratio
Code & Data
JSON Formatter
Format, validate and minify JSON
Diff Checker
Compare two texts line by line
Regex Tester
Test regular expressions live
JWT Decoder
Inspect JSON Web Tokens
Minify & Beautify
Compress or format JS, CSS and HTML
SQL Formatter
Beautify SQL for any dialect
Markdown Preview
Live Markdown to HTML
Data Converter
JSON ↔ YAML, CSV, XML, PHP, SQL
XML Formatter
Format, validate and minify XML
String Escaper
Escape for JSON, JS, SQL, regex, CSV
Images & Design
QR Code Generator
QR codes for links, text and Wi-Fi
Image Converter
Convert and resize PNG, JPEG, WebP
Color Converter
HEX, RGB, HSL, OKLCH and contrast
Barcode Generator
Code 128, EAN-13, UPC and more
Favicon Generator
All favicon sizes from one image
Gradient Generator
Build CSS gradients visually
Box Shadow Generator
Layered CSS box shadows
CSS Unit Converter
px ↔ rem, em, pt, vw, %
Aspect Ratio Calculator
Resize while keeping proportions
Security
Password Generator
Strong random passwords
UUID Generator
Random v4 and time-ordered v7 UUIDs
Hash Generator
MD5, SHA-1, SHA-256, SHA-512
Bcrypt Generator
Hash and verify bcrypt passwords
Encoding
Base64
Encode and decode Base64
URL Encoder
Encode, decode and parse URLs
HTML Entities
Escape and unescape HTML
Number Base Converter
Binary, octal, decimal, hex
Text to Binary
Text ↔ binary, hex, decimal, code points
Text
Word Counter
Count words, characters and more
Case Converter
camelCase, snake_case, Title Case…
Lorem Ipsum
Generate placeholder text
Remove Duplicate Lines
Keep only unique lines
Find & Replace
Replace text with plain text or regex
Text Sorter
Sort lines A–Z, numerically or by length
Slug Generator
Turn titles into URL slugs
Text Reverser
Reverse characters, words or lines
Time & Math
Percentage Calculator
Percent of, change and ratio
Unit Converter
Length, weight, data, speed…
Age Calculator
Exact age and next birthday
Timestamp Converter
Unix time ↔ human dates
Date Calculator
Days between dates, add or subtract
Web & DevOps
Cron Expression Parser
Explain cron schedules in plain English
HTTP Status Codes
What every status code means
Subnet Calculator
IPv4 CIDR ranges and netmasks
Chmod Calculator
Unix permissions: 755 ↔ rwxr-xr-x