JWT Decoder

Decode JWT (JSON Web Token) to view header and payload contents. Easily check token expiration, issuer, and other claim information.

Key Features

Header Analysis

Check algorithm, token type and more

Payload Viewer

View user info, permissions and claims

Expiration Check

Verify token validity and expiration

Privacy First

All processing in browser, no server upload

Notice

  • Signature verification is not performed (requires secret key).
  • Handle tokens with sensitive information carefully.
  • All processing happens in your browser only.

This calculator is provided for informational purposes only.

Results are estimates and may differ from actual amounts.

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