How to Use
- Paste a JWT.
- View decoded parts.
- Check claims.
JWT Debugger
Decode the header and payload of a JSON Web Token without verifying signature.
JWT Information
- JWT consists of three parts: header, payload, and signature
- Header contains token type and algorithm information
- Payload contains the claims or data
- Signature ensures the token hasn't been tampered with
Features
- Decode header/payload
- Claims display
- Copy decoded data
Benefits
- Understand token structure
- Debug authentication
- No backend needed
Use Cases
- API troubleshooting
- Learning OAuth
- Token inspection
Frequently Asked Questions
Quick answers about this tool.
Does it verify the signature?
No, it only decodes; signature verification requires a secret.
Is my token safe?
Processing happens locally in the browser.