JWT Decoder

Decode and inspect JWT headers, payloads, and claims.

Client-side

Header + Payload

Claims Inspector

No Upload

JWT Token

Paste a JSON Web Token to inspect its contents.

What is a JWT?

A JSON Web Token (JWT) is a compact token format commonly used for transmitting claims between systems. A JWT normally consists of three Base64URL-encoded sections separated by periods:

header.payload.signature

This tool decodes the header and payload locally in your browser. Your JWT is not uploaded to a server.