Does it verify the signature?

No — verification requires the secret/key. This tool only decodes.

Is the token sent anywhere?

No — decoding happens in your browser.

JSON Web Token — a compact, self-contained way to transmit signed claims.

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Decode JSON Web Tokens to inspect payload.

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Header

{
  "alg": "HS256"
}

Payload

{
  "sub": "123",
  "name": "ToolsHub"
}

Paste a JWT to inspect its header and payload — signature is not verified.

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