JWT Decoder

Free online JWT decoder. Paste a JSON Web Token to view the header, payload, and signature. Humanized expiration timestamps. 100% client-side.

How to use the JWT Decoder

  1. Open the JWT Decoder — it loads instantly in your browser, with no sign-up or install.
  2. Enter your input by typing, pasting or uploading as the tool requires; results update automatically.
  3. Copy or download the result. Nothing you enter leaves your device.

Frequently asked questions

Is the JWT Decoder free?

Yes. The JWT Decoder on UtilitySuite is completely free, with no account, sign-up or payment required.

Do I need to create an account?

No. Every UtilitySuite tool and game works instantly with no login or registration.

Does my data stay private?

Yes. The JWT Decoder runs entirely in your browser — the text, numbers or files you enter are never uploaded to a server.

Is my token sent to a server?

No. The JWT is decoded entirely in your browser; the header, payload and signature are shown locally.

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JWT Decoder
Waiting for JWT…
Encoded JWT
Color-coded
header.payload.signature
Header ● algorithm + type
Waiting for input…
Payload ● claims
Waiting for input…
Humanized Claims
Decoded timestamp claims will appear here…
⚠ Signature not verified. This tool only decodes the JWT contents. To trust a JWT in production, verify its signature server-side using the issuer's secret or public key.
Ready — paste a JWT to decode utilitysuite.io
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