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JWT Decoder

Decode JSON Web Tokens and inspect their header, payload, and signature. No token is uploaded.

How to use JWT Decoder

  1. 1Paste your input in the panel above or use the example data if available.
  2. 2Choose an action — format, generate, convert, encode, or analyze.
  3. 3Your result appears instantly. Use Copy to grab it, or Download if a file option is shown.

Runs entirely in your browser

Nothing you type, paste, generate, or upload leaves your device.

Frequently asked questions

Does this verify signatures?

No, we decode only. Verification requires a secret that shouldn't leave your browser.

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