Developer Tools
Local-first utilities for developers. No account needed.
Format JSON, encode Base64, decode JWTs, test regex patterns, and more — all client-side. No data leaves your browser.
7 tools live
JSON Formatter
Format, validate, and minify JSON.
Base64 Encoder/Decoder
Encode and decode Base64 strings.
JSON to CSV
Flatten JSON arrays into spreadsheets.
Diff Checker
Visual diff for text and code.
JWT Decoder
Decode and inspect JWT tokens.
Regex Tester
Test regex patterns with live matches.
Text to HTML
Convert Markdown or plain text to a full HTML document.
Frequently asked questions
Yes. All tools run locally in your browser. No data is transmitted to any server, making them safe for API keys, tokens, and private JSON.
JSON Formatter, Base64 Encoder, JSON to CSV, Diff Checker, JWT Decoder, and Regex Tester are all in development.
No. All tools run directly in your browser. There is nothing to install or configure.