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How to use JWT Debugger

Paste a JWT and the tool splits it on the dots, Base64URL-decodes the header and payload to readable JSON, and shows the raw signature segment.

Frequently asked questions

Is it safe to paste my JWT here?

Decoding happens entirely in your browser with no network requests, but avoid pasting live production tokens into any online tool as a precaution.

Can it verify the signature?

Verification needs the signing secret or public key. This debugger decodes the header and payload; use a signing tool to verify or issue tokens.

What do exp and iat mean?

iat is the issued-at time and exp is the expiry, both Unix timestamps. A token is expired once the current time passes exp.

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