🔐 JWT Decoder
Decode JWT tokens — view header, payload, expiration, and issuer. No server upload, fully private.
What is a JWT Token?
JSON Web Token (JWT) is a compact, URL-safe token format used for authentication and information exchange. It consists of three Base64-encoded parts separated by dots: Header (algorithm & type), Payload (claims), and Signature (verification). Use this tool to inspect any JWT's contents locally.