JWT Decoder

Decode JWT (JSON Web Token) headers and payloads online. Inspect token claims, check expiration, and view formatted timestamps. No verification — inspection only.

JWT Token

How to Use

Paste your JWT token in the input area
Click Decode JWT
View the decoded header, payload, and signature
Check if the token is expired based on the 'exp' claim

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Frequently Asked Questions

Is this secure? Can anyone see my token?

All decoding happens in your browser — your token is never sent to any server. However, JWT tokens can be decoded by anyone who has them, so never share tokens or expose them in public places.

Does this verify the token signature?

No, this tool only decodes the token contents. It does not verify signatures. For signature verification, use a JWT library in your application with the proper secret or public key.