TOOLSTEKNO

JWT Decoder

Decode and inspect your JSON Web Tokens (JWT) payload and header safely.

How to Use JWT Decoder

  1. 1

    Paste Your JWT

    Copy a JWT from your application (e.g., from a browser's developer tools or Postman) and paste it.

  2. 2

    View Decoded Sections

    The tool instantly decodes and displays the Header, Payload, and Signature sections.

  3. 3

    Inspect Claims

    Review all claims including exp (expiration), iat (issued at), sub (subject), and more.

Frequently Asked Questions

Is it safe to paste my JWT here?
This tool runs 100% in your browser — your token is never sent to any server. However, avoid using production access tokens with full privileges in any web tool as a general security practice.
Can this tool verify a JWT signature?
Signature verification requires the secret key. This tool only decodes the token without validating the signature.
What is the exp claim?
The 'exp' (expiration time) claim indicates the time after which the token is no longer valid, expressed as a Unix timestamp.