JWT Decoder

Decode JSON Web Tokens (JWT) to view header and payload.

What is Online JWT Decoder?

JWT Decoder is a specialized tool for inspecting and debugging JSON Web Tokens (JWT). It allows you to decode the header and payload of a token without needing the secret key, making it ideal for checking claims, expiration times, and algorithm types.

Note that this tool only decodes the token; it does not verify the signature (which requires the secret). It's a purely client-side utility, meaning your tokens are never sent to a server, providing a secure environment for inspecting sensitive authentication data.

How to use Online JWT Decoder?

  1. Paste your encoded JSON Web Token (JWT) into the input box.
  2. The tool will instantly decode the Header, Payload, and Signature structure.
  3. Review the claims and metadata contained within the token and use the "Copy" buttons to extract specific parts.