Free Developer Tools Online
Format, validate, encode and generate — essential utilities for every developer. 13 tools available — all run in your browser, no signup required.
JSON Formatter
Format, beautify and minify JSON with syntax highlighting.
JSON Validator
Validate JSON syntax with detailed error messages and line numbers.
Base64 Encoder/Decoder
Encode and decode Base64 strings and files instantly.
UUID Generator
Generate cryptographically secure UUIDs (v4) in bulk.
Regex Tester
Test and debug regular expressions with live match highlighting.
Color Converter
Convert colors between HEX, RGB, HSL, and HSB formats instantly.
Hash Generator
Generate SHA-1, SHA-256, SHA-512, and MD5 hashes from text.
URL Encoder / Decoder
Encode and decode URL components and query strings.
JWT Decoder
Decode and inspect JWT tokens — header, payload, and expiry.
Password Generator
Generate secure random passwords with custom rules.
Timestamp Converter
Convert Unix timestamps to readable dates and vice versa.
Word Counter
Count words, characters, sentences, and estimate reading time.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text for mockups and wireframes.