JWT Token Decoder & Inspector
Dev
Decode and inspect JSON Web Tokens (JWT) safely in your browser. Check token expiration without leaks.
Runs entirely on your machine. Zero bytes uploaded to the cloud.
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About JWT Token Decoder & Inspector
Inspect JWT Header, Payload, and Signature without sending sensitive secrets to external servers. Features instant timestamp expiration verification and formatted JSON viewing.
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Frequently Asked Questions about JWT Token Decoder & Inspector
Is it safe to paste production JWT tokens here?▼
Yes. All decoding occurs locally in your browser memory using JavaScript. No network requests are sent.
Can this tool verify the signature with a secret key?▼
Currently it provides inspection and decoding of claims. We deliberately do not ask for secret signing keys to ensure absolute privacy.