Free JWT Decoder — No Upload, Instant Payload Inspector
JWT decoders are used by developers to inspect token payloads during API development and debugging. Because JWTs often contain authentication claims, using a server-based decoder shares sensitive data with a third party. This decoder runs in your browser — paste a token to see its header and payload immediately.
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JWT decoding is performed by JavaScript in your browser — your token is never sent to any server.
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JWT Decoder →
Free · No upload · No account required
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Frequently Asked Questions
- Can I use this with production API tokens?
- Technically yes, but JWTs from production systems should be handled with care. This tool does not transmit your token, but production tokens should generally not be shared with any third-party service.
- Does this tool check JWT expiration?
- The tool displays the "exp" claim from the payload. Interpreting whether a token is currently valid requires comparing "exp" to the current timestamp.