The JWT Token Inspector is an essential developer and security auditing tool for inspecting and debugging RFC 7519 JSON Web Tokens. It instantly decodes the Base64URL-encoded Header and Payload (Claims), validates JSON syntax, formats Unix epoch expiration timestamps (exp, iat, nbf) into human-readable local dates, and calculates token validity.
Instantly identifies whether a token is active or expired, and translates Unix epoch timestamps into clear date strings.
Tokens often contain sensitive user IDs or authorization scopes. We never transmit or store your tokens on remote servers.
Paste any encoded 3-part JWT token (header.payload.signature) into the input area.
View colorized, formatted JSON structures for the token header and payload claims.
Review the calculated expiration countdown and verify subject (sub) and issuer (iss) details.
Decoding reveals the payload claims. To verify the cryptographic signature, the secret key (for HMAC) or public key (for RSA/ECDSA) is required by your backend identity provider.
Yes, because 2FASafe performs all decoding entirely within your local browser. However, as best practice, avoid sharing private signing keys.