JWT Decoder

A JSON Web Token (JWT) is a compact, URL-safe token used for authentication. It contains three parts: header, payload, and signature, separated by dots.

Paste your JWT token, and the tool instantly displays the decoded header, payload (with all claims), and signature status.

Yes, completely free with no signup.

All decoding happens client-side. Your token never leaves your browser. However, avoid sharing JWTs in public.

The tool decodes and displays all parts. Signature verification requires the secret key, which we don't store or request for security reasons.