Decode JSON Web Tokens locally in your browser. The tool splits a JWT into header, payload, and signature sections,
pretty prints JSON claims, and summarizes common timestamps such as exp, nbf, and iat.
You can paste a raw token or an Authorization header value that starts with Bearer.
This page decodes and verifies supported JWT signatures only on your device. HMAC verification supports HS256, HS384, and HS512 shared secrets. RSA verification supports RS256, RS384, and RS512 with PEM public keys.