Free developer tools for formatting, validating, converting, and debugging code — JSON, regex, JWT, Base64, and more. Built for speed so you can paste, fix, and move on.
JSON Formatter
Beautify, validate and minify JSON instantly.
HTML Formatter
Format and prettify HTML code with consistent indentation
CSS Minifier
Compress CSS by removing whitespace and comments
JavaScript Minifier
Minify JS code to reduce file size
Base64 Encoder / Decoder
Encode text or files to Base64 and decode back
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes
UUID Generator
Generate random UUID v1 and v4 identifiers
Regex Tester
Test regular expressions against sample text with match highlighting
JWT Decoder
Decode and inspect a JSON Web Token header, payload and signature
Cron Expression Generator
Build and explain cron job schedules visually
SQL Formatter
Format and beautify SQL queries with keyword highlighting
CSS Gradient Generator
Build linear/radial CSS gradient code with a visual color picker
Flexbox Playground
Visual CSS flexbox generator with live code output
CSS Grid Generator
Visual CSS Grid layout generator with code output
Markdown Previewer
Live side-by-side Markdown editing and HTML preview
Unix Timestamp Converter
Convert Unix timestamps to readable dates and vice versa
HTML Minifier
Strip whitespace and comments from HTML
JSON Minifier
Compress JSON by removing all whitespace
Box Shadow Generator
Generate CSS box-shadow code with live visual preview
HTTP Status Code Lookup
Look up the meaning of any HTTP status code
XML Formatter
Format and validate XML code
YAML to JSON Converter
Convert YAML config files to JSON format
JSON to YAML Converter
Convert JSON to YAML format
JSON to CSV Converter
Convert JSON arrays to CSV format
CSV to JSON Converter
Convert CSV data to structured JSON
HTML Encoder / Decoder
Encode HTML special characters to entities and vice versa
Border Radius Generator
Generate CSS border-radius values visually
User Agent Parser
Parse browser user-agent strings into readable device info
.htaccess Generator
Generate common .htaccess rewrite rules for Apache