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JWT Decoder

Decode and inspect JWT tokens. All processing happens locally in your browser.

JWT Token0 chars
About JWT

JSON Web Tokens (JWT) are an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. JWTs can be signed using a secret (HMAC) or a public/private key pair (RSA or ECDSA).

JWT Structure

header.payload.signature

Each part is Base64URL encoded. The signature is created by signing the header and payload with a secret key.

Security Note

🔐 JWTs are encoded, not encrypted. Anyone can decode and read the contents. Never store sensitive information in the payload unless you also encrypt the JWT.