JWT Decoder

JWT Decoder shows you a JWT's header and payload the moment you need them — paste a token into the toolbar popup, or select one on any page and right-click "Decode as JWT". It shows: - The decoded header and payload, pretty-printed - Human-readable timestamps for exp/iat/nbf - Whether the token is expired Everything happens locally in the popup — the token is never sent anywhere, and no signature verification is attempted (that would need the signing key, which this extension never has). This is a free, independent hobby project.