Free Online Developer Tools
A collection of free, fast, and privacy-friendly tools for developers. Everything runs in your browser — no data is sent to any server.
JSON Formatter
Format, validate, and beautify JSON data instantly
QR Code Generator
Generate customizable QR codes for any text or URL
Base64 Encoder
Encode and decode Base64 strings with full UTF-8 support
Regex Tester
Test regular expressions with live matching and highlighting
UUID Generator
Generate UUIDs, ULIDs, and NanoIDs in bulk
All tools are free, open, and run entirely in your browser. No data leaves your machine.