Developer Tools
JSON Formatter & Validator
Format, validate and pretty-print JSON in your browser — no data leaves your machine.
JWT Decoder
Decode a JSON Web Token’s header and payload in your browser — no data leaves your machine.
UUID Generator
Generate random v4 UUIDs in your browser — no data leaves your machine.
Regex Tester
Test regular expressions against text in your browser — no data leaves your machine.
Base64 / Hex / URL Converter
Encode and decode Base64, hex and URL-encoded text in your browser — no data leaves your machine.
.gitignore Generator
Combine .gitignore templates for your stack in your browser — no data leaves your machine.
Cron Expression Parser
Turn a cron expression into a plain-English schedule — no data leaves your machine.
Markdown Previewer
Preview GitHub-flavored Markdown live in your browser — no data leaves your machine.