JWT Decoder

Decode JSON Web Tokens securely in your browser.

100% Private: Your data never leaves your device. Processed locally in your browser.

How to Use

  1. Paste your JSON Web Token (JWT) into the top input box.
  2. The tool will instantly decode the token and display the Header and Payload.
  3. If the token is invalid or malformed, an error message will appear.

Frequently Asked Questions

Is it safe to decode my JWT here?

Yes, absolutely. The decoding happens 100% locally in your web browser. We never send your tokens to a server.

Can this tool verify the signature?

No, this tool only decodes the Base64Url encoded Header and Payload. It does not verify the cryptographic signature.

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