10 free tools
Developer Tools
Format JSON, encode text, generate hashes and other handy developer utilities.
JSON Formatter
Format, minify and validate JSON in your browser.
Base64 Encode / Decode
Encode and decode Base64 text and files.
URL Encode / Decode
Percent-encode and decode URLs and query strings.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
Password Generator
Create strong, secure passwords in one click.
JWT Decoder
Decode and inspect JSON Web Tokens without sending them anywhere.
Color Converter
Convert colors between HEX, RGB and HSL with a live preview.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back.
Regex Tester
Test regular expressions against text with live matches.
Markdown Editor
Write Markdown with a live formatted preview.
About our free developer tools
Everyday utilities for developers and engineers: format and validate JSON, decode JWTs, encode Base64 and URLs, generate hashes and secure passwords, test regular expressions, convert colors and Unix timestamps, and preview Markdown. No tracking of your payloads — tokens and data are processed only in your browser.
Frequently asked questions
Is it safe to paste tokens or API responses here?
Yes. Developer tools run entirely client-side, so tokens, JSON and other data are never sent to FaaTools servers.
Do these tools work offline?
Once a tool page has loaded, most developer tools keep working without an internet connection because all logic runs in your browser.