Is my data sent to a server?

No, all processing happens in your browser. Your data never leaves your device.

Is this tool free to use?

Yes, this tool is free with daily usage limits. Upgrade to Premium for unlimited access.

Decode JSON Web Tokens instantly. All parsing happens securely on your device.

Encoded JWT

Header (Algorithm & Token Type)

Payload (Data & Claims)

Signature (Cannot be verified purely fully on client without secret, but here is the signature hash)