Common Tools · Signature and Security
JWT / JWS Inspector
Decode JWT header/payload and verify HS/RS/ES signatures.
JWT / JWS Inspector
Decode and verify JSON Web Tokens locally with WebCrypto.
Awaiting input
Input
Decoding runs locally in your browser. Secrets never leave this tab.
Verification reflects only the cryptographic check — also enforce issuer, audience, and expiry in your server logic.
Output
Paste a JWT to inspect its header, payload, and signature.