Initial public release - now live on the Chrome Web Store.
Install: https://chromewebstore.google.com/detail/jotscope-jwt-inspector/mklonjinblipphhognhkcjklpnkjehpe
Features
- Offline JWT decode, inspect, and verify - everything runs locally, no network calls, no telemetry.
- Visual claims tree: typed values, timestamp formatting, nested objects, array chips, and privileged-role flagging.
- Multi-token detection from a pasted URL or blob (e.g. OAuth callback fragments).
- Local history of recently decoded tokens - deduped, capped, disable-able, and clearable in Settings.
- Signature checks with
alg: none/ weak-algorithm warnings and an optional, opt-in JWKS fetch. - Light and dark themes.
Install unpacked
jotscope.zip below is the packaged extension. Download it, unzip, then in Chrome open chrome://extensions, enable Developer mode, and click Load unpacked - or just install from the Web Store link above.