Decode JWT (JSON Web Token) to inspect headers and payload claims without signature verification.
⚠️ Security Warning
This tool only decodes JWT tokens without signature verification. Do not use this for validating tokens in production applications. Always verify signatures on the server side.
A JWT (JSON Web Token) consists of three Base64-encoded parts: header, payload, and signature. The header contains metadata about the token, while the payload contains claims (data). Common claims include 'exp' (expiration), 'iat' (issued at), and 'nbf' (not before).