Developer Utilities
Essential tools for developers: JSON formatting, Base64 encoding, regex testing, URL encoding, and text diff comparison.
JSON Formatter
Free online JSON formatter and validator. Format, beautify, minify, and validate JSON data instantly with tree view, error detection, and copy-to-clipboard.
Base64 Encoder Decoder
Free online Base64 encoder and decoder. Convert text to Base64 or decode Base64 strings instantly. Encode files to Base64 data URLs. 100% client-side, no uploads.
URL Encoder Decoder
Free online URL encoder and decoder. Encode URLs and components, or decode percent-encoded strings. Supports both encodeURIComponent and encodeURI modes. 100% client-side.
Regex Tester
Free online regex tester and debugger. Test regular expressions with flags (g, i, m, s, u), highlight matches, view capture groups, and explore common regex patterns. 100% client-side.
Text Diff Checker
Compare two texts line by line instantly in your browser. Free online diff tool with color-coded additions, deletions, and unchanged lines.
Random Number Generator
Generate random numbers with statistics and export options.
Wheel Spinner
Animated spinning wheel for random decisions and picks.
Dice Roller
Roll any dice type with stats, history, and advantage support.