Inspect auth payloads quickly
Decode the header and payload sections when debugging login flows, API requests or role-based access behavior.
JWT Decoder
Decode JWT header, payload and timing fields.
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Inspect JWT tokens while debugging authentication payloads, claims and expiry behavior.
- Header decode
- Payload decode
- Expiry check
- Signature presence
Review timing claims
Issued-at and expiry values are converted into readable timestamps so stale or unexpectedly long-lived tokens are easier to spot.
Check structure before sharing logs
A quick local decode helps support and QA teams understand claims before deciding what should be redacted from a bug report.
Browser-based decoding
The token is decoded locally in your browser for quick inspection. This tool does not verify the token signature or authenticate requests.
Frequently asked questions
No. It decodes the JWT header and payload for inspection, but it does not validate the signature or confirm that the token is trusted.
No. The decoder runs in your browser, so the pasted token is processed locally on your device.
It shows the decoded header, decoded payload, signature presence, issued-at timestamp, expiry timestamp and whether the token appears expired.
Avoid pasting sensitive production tokens into any tool unless your security policy allows it. Use test tokens or redacted examples when possible.