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Decoder

JWT Decoder

JWT Decoder is a free online decoder that helps you decode a JSON Web Token to inspect its header and payload; runs locally, your token never leaves the browser. JWT Decoder uses 1 input field, returns 5 output values, and runs in your browser on the device.

Key facts

Inputs
1 field: JWT
Outputs
5 values: Header, Payload, Signature (hex), Algorithm, and Expires
Runtime
your browser on the device
Mode
Decoder
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use JWT Decoder

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

JWT Decoder details

First, enter JWT in JWT Decoder. Next, review Header, Payload, Signature (hex), Algorithm, and Expires. Additionally, JWT Decoder uses 1 input field and 5 output blocks so the result is easy to scan and copy.

Paste any JWT and instantly see its header, payload (claims), algorithm, and expiration. JWT Decoder only decodes the Base64URL segments; it does NOT verify the signature, which would require the issuer's secret or public key. JWT Decoder runs in your browser; tokens are never transmitted.

Common searches

  • jwt decoder
  • jwt decode
  • decode jwt
  • json web token decoder
  • jwt parser
  • jwt viewer

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Frequently asked

What is JWT Decoder?

JWT Decoder is a free online decoder that helps you decode a JSON Web Token to inspect its header and payload; runs locally, your token never leaves the browser. JWT Decoder uses 1 input field, returns 5 output values, and runs in your browser on the device.

What inputs and outputs does JWT Decoder use?

JWT Decoder uses 1 input field: JWT. JWT Decoder returns 5 output values: Header, Payload, Signature (hex), Algorithm, and Expires.

Do my files and data stay private?

Yes. JWT Decoder runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use JWT Decoder?

Open JWT Decoder, paste or fill in the input fields, and the result updates instantly. JWT Decoder runs in your browser with no upload and no waiting.

Which browsers does JWT Decoder support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. JWT Decoder uses standard web APIs and does not require any plugin, extension, or sign-up.