Free Developer Tools Online
Browser-based utilities for everyday development tasks. No installs, no sign-up — open a tool and start working immediately.
JSON Formatter
Format, validate, and minify JSON data instantly.
UUID Generator
Generate random UUIDs (v4) quickly.
Base64 Encoder/Decoder
Encode or decode strings to Base64 format.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
URL Encoder/Decoder
Encode or decode URLs and query strings using percent-encoding.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal.
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, and expiry.
CSS Minifier
Remove comments and whitespace from CSS to reduce file size.
JS Minifier
Strip comments and collapse whitespace from JavaScript.
HTML Viewer
Preview and format HTML code live in a sandboxed browser.