A JWT (JSON Web Token) is a compact, URL - safe token format used for securely transmitting information between parties as a JSON object.

The header, payload, and signature are separated and displayed as formatted JSON, along with expiration status and algorithm information.

This tool decodes and displays the token contents. Signature verification requires the secret key and is not performed client - side for security reasons.

नहीं, JWT decoding happens entirely in your browser. Your token is decoded locally with JavaScript — the token content is never sent to any server.