JWT Decoder

How to use

1. Paste your JWT token in the input area.
2. The tool decodes header and payload as readable JSON.
3. Check exp, iat, sub, role, and custom claims quickly.

Use cases

• Debug login token payload after authentication
• Check role and permission claims in access tokens
• Inspect token expiry issues during session testing

Common errors

• Assuming decoded JWT means signature is verified
• Using tokens with missing header, payload, or signature segments
• Copying tokens with hidden spaces or newline characters