JWT Decoder and Inspector

Paste any JWT to decode header and payload instantly. We also check exp and nbf timing claims locally in your browser.

JSON Web Token Tool

Decode tokens and verify signatures locally in your browser. Your token, secret and keys never leave your device.

Header

Payload

Signature

Verify signature

Paste the PEM public key (-----BEGIN PUBLIC KEY-----) or a JWK JSON object. Verification runs entirely in your browser via WebCrypto — the key never leaves your device. Supported: HS/RS/PS/ES 256, 384 and 512.

Public key (PEM or JWK)