JWT Decoder
Decode and inspect JWT tokens
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token used to securely transmit information between parties. It consists of three Base64URL-encoded parts: header, payload, and signature.
JWT structure
header.payload.signature — The header contains the token type and algorithm. The payload contains claims (user data). The signature verifies the token hasn't been tampered with.
Privacy
All decoding happens in your browser. No token data is sent to any server.