JWT Decoder

Decode JWT tokens to view their header and payload. Useful for debugging and inspection.

Runs in your browser · No data sent anywhere
JWT Token
Decoded Payload

Token Structure

JWT consists of three parts separated by dots (.):

  1. Header — Algorithm and token type
  2. Payload — Claims and data (shown above)
  3. Signature — Verified by the server

Note: This tool only decodes the JWT. It cannot verify signatures without the secret key.

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Frequently Asked Questions

Can I see the expiration date of a JWT using this tool?

Yes, once decoded, the tool displays the payload, which typically includes the exp (expiration) claim.

Is it safe to decode a JWT that contains sensitive user information?

Yes, because the decoding happens entirely in your browser and no data is ever sent to a server.