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JWT Decoder

Decode JWT tokens and view the contained data.

Paste a JWT here...
Waiting for token...
Waiting for token...
alg: n/a
No signature present.
Enter a token and key/secret to verify the signature.
Waiting for token payload...

What JWT decoder is used for

JWT decoder helps you inspect token header, payload, and signature parts, then verify signatures with shared secret or public key when available.

Common JWT debugging tasks

  • Inspect claims like exp, iat, aud, and iss
  • Validate if a token structure is correct
  • Verify signatures while debugging auth flows
  • Troubleshoot token issues in staging and production

Related developer tools

How to use?

1
1

Enter your JWT token.

2
2

View the decoded Header and Payload automatically.

Frequently Asked Questions

Does JWT Decoder verify the token?

This tool mainly decodes and displays token parts. Signature verification requires the correct key and algorithm.

Is my token sent to a server?

No. Decoding runs in your browser and token data stays on your device.