What is JWT Inspector?
Inspect compact JSON Web Tokens locally, view header and payload, registered and custom claims and readable Unix dates. A decoded token is not authenticated; this tool never verifies signatures, issuers or audiences.
How to use this tool
- Paste a compact three-part JWT and select Inspect JWT.
- Review the decoded header, claims, dates and security warnings.
- Verify the signature, issuer and audience on a trusted backend before granting access.
Example
Registered claims: iss, sub, aud, exp, nbf, iat, jti.