JWT Decoder
Decode and inspect JSON Web Tokens without verification
How to Use JWT Decoder
- Paste your JWT token into the input field
- The header and payload are decoded automatically
- View all claims in a readable format
- Check expiration and issued-at times
About JWT Decoder
Decode JSON Web Tokens (JWTs) and inspect their header, payload, and signature. See the claims, expiration time, and other data inside any JWT. Perfect for debugging authentication issues and understanding token contents.
Frequently Asked Questions
Does this verify the JWT signature?
No, this tool only decodes and displays the token contents. It doesn't verify signatures.
Is it safe to paste my JWT here?
Yes, all decoding happens locally in your browser. Your token is never sent to any server.
What parts of a JWT can I see?
You can see the header (algorithm, type), payload (claims), and the signature (encoded, not decoded).
Why can't I decode the signature?
The signature is a cryptographic hash that can't be decoded. It's used for verification, not data storage.