Developer
Formatters, testers and helpers for everyday coding.
JSON Formatter & ValidatorFormat, validate and minify JSON with configurable indentation and key sorting. Errors are shown with line and column.JWT DecoderDecode JSON Web Tokens, inspect header and claims with readable dates, and verify HS, RS, PS and ES signatures — the token never leaves your browser.Regex TesterTest JavaScript regular expressions live: highlighted matches, capture groups, named groups and replace preview.UUID / ULID GeneratorGenerate random UUIDs (v4), time-ordered UUIDs (v7) and ULIDs — one or thousands at once — and decode existing IDs.