JWT Decoder
Inspect JWT headers and payloads without leaving the page.
Local decode with claim pretty print
Expiration badge based on current time
Header and payload sections for tutorial screenshots
Token input
Inspection only. Signature verification is out of scope.
Decoded claims
Useful for support docs and troubleshooting screenshots.
Paste a token to inspect header and payload claims.
Common use cases
- Checking expiration and issuer claims during auth debugging
- Reviewing scopes before a launch or support handoff
- Teaching non-engineers what a token contains
FAQ
Does the tool verify the JWT signature?
No. This decoder is meant for inspection only, which keeps the tool lightweight and purely front-end.
Why does my token show an invalid format error?
JWTs need three dot-separated parts. If one segment is missing or not valid Base64URL, the decoder will warn you.
More guides