Developer Tools
The small utilities you reach for a dozen times a day. Every one runs entirely in your browser — nothing you paste is uploaded, so tokens and payloads stay on your machine.
JSON Formatter
Beautify, minify and validate JSON with precise error positions.
JSON Validator
Check JSON syntax and get the exact line and column of any error.
Base64 Encode / Decode
Encode and decode Base64 with full Unicode and URL-safe support.
JWT Decoder
Decode a JWT's header and payload and check when it expires.
UUID Generator
Generate random v4 UUIDs in bulk, with formatting options.
Password Generator
Create strong random passwords with a real entropy estimate.
Regex Tester
Test regular expressions live, with capture and named groups.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
Timestamp Converter
Convert Unix timestamps to dates and back, local and UTC.
URL Encoder / Decoder
Percent-encode or decode URLs and inspect their parts.
Color Converter
Convert HEX, RGB and HSL, with WCAG contrast checks.
Cron Expression Tester
Validate cron syntax and preview the next run times.
SQL Formatter
Turn one-line SQL into readable, indented queries.
Code Minifier
Minify CSS, HTML and JS by removing comments and whitespace.