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How to use JWT Decoder

Paste a JWT token, and the tool decodes and displays its header, payload, and signature without verifying it against a secret.

Frequently asked questions

Is it safe to paste my JWT here?

Never paste production tokens in public tools. This tool runs entirely in your browser with no server transmission.

Can it verify the signature?

Signature verification requires the secret key. This tool decodes the header and payload only.

What are the three JWT parts?

Header (algorithm), Payload (claims/data), Signature (verification). Separated by dots.

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