Free JWT Decoder

Decode JSON Web Tokens instantly.

How This Tool Works

This tool decodes the header and payload of a JWT token using Base64 decoding. It does not verify the signature. Everything runs in your browser.

Frequently Asked Questions

Does it verify the signature?

No. This tool only decodes the data. Signature verification requires the secret key.

Is my token safe?

Yes. Your token is never uploaded. All processing happens in your browser.