JWT Debugger & Inspector
Decode JWT tokens, inspect header/payload claims, and check for common vulnerabilities including alg=none, weak secrets, and expired tokens.
JWT Security for Bug Bounty Hunters
JSON Web Tokens (JWT) are widely used for authentication and session management. Common vulnerabilities include the "alg=none" attack (where the server accepts unsigned tokens), weak HMAC secret keys that can be brute-forced, token expiration bypasses, and algorithm confusion attacks (RS256 public key used as HS256 secret). Understanding how to decode and analyze JWT tokens is essential for API security testing and bug bounty hunting.