Developer Tools
JSON, regex, UUIDs, timestamps, JWT, Markdown, CSS and encoding utilities. All 10 tools below run 100% in your browser — free, instant and private.
JSON Formatter & Validator
Beautify, validate and minify JSON with clear error locations.
UUID Generator
Generate cryptographically secure UUID v4 identifiers, in bulk.
Regex Tester
Test regular expressions live with match highlighting and a cheat sheet.
Markdown Editor & Preview
Write Markdown with a live side-by-side HTML preview.
CSS Gradient Generator
Design linear and radial gradients visually and copy the CSS.
HTML Entity Encoder / Decoder
Escape or unescape HTML entities like <, > and &.
JWT Decoder
Decode JSON Web Tokens and inspect header, payload and expiry — locally.
CSS Minifier
Minify CSS by removing comments and whitespace — see the size savings.
JavaScript Minifier
Safely compress JavaScript by stripping comments and whitespace.
Text to HTML Converter
Convert plain text to clean HTML paragraphs with encoded entities.
Explore other categories
Text Tools
Count, convert, clean, encode and transform text instantly.
11 toolsImage Tools
Compress, resize and convert images privately — files never leave your device.
6 toolsCalculators
Percentage, age, BMI, loans, interest, dates and more with step-by-step results.
10 toolsConverters
Units, colors, number bases, Roman numerals and Morse code.
6 tools