What is a JSON Web Token (JWT)?

A JWT is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.

Can this tool verify token signatures?

No. Signature verification requires the server-side secret key or public certificate. This tool decodes and parses the structure for debugging client claims.

Does this tool support encoding JWTs?

Yes! Switch to the Encoder tab to generate signed JWTs using HMAC-SHA256 (HS256) entirely client-side.

JWT Decoder & Encoder

Decode and encode JSON Web Tokens (JWT) online. View header claims, payload values, signature details, token expiration, or sign new tokens in real-time.

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