Is it safe to decode JWT tokens online?

Yes, when using a browser-based tool. Our JWT decoder runs entirely in JavaScript in your browser — your token is never sent to any server. However, never share tokens with public server-side tools, as JWTs may contain sensitive data.

A JWT (JSON Web Token) is a compact, URL-safe token used for authentication and data exchange. It consists of three parts: Header (algorithm), Payload (claims/data), and Signature, encoded in Base64 and separated by dots.

Can this tool verify the JWT signature?

Signature verification requires the secret key or public key. This tool decodes and displays the contents without verification, which is useful for inspecting the payload during development.

Is the JWT decoder free?

Yes, completely free. No account, no limits.

JWT Decoder - Decode & Inspect JWT Tokens Free Online | No Upload

📖 Read the full JWT Decoder guide