JWT Decoder
Inspect a JWT's header, payload and dates (iat, exp, nbf) without sending it to any server.
The link keeps what is on screen.
Processed in your browser; nothing is sent.
Use from the terminal (JSON)
This tool also runs outside the site: the cli.js script uses the same logic as this page and returns the result as JSON. Parameters are the same as this page's URL — copy the command below with the values on screen.
Deno
deno run -q "https://tools.thecodecodex.com/cli.js?tool=jwt"
Node.js / Bun
curl -s https://tools.thecodecodex.com/cli.js | node --input-type=module - jwt token=…
| Parameter | Description | Default |
|---|---|---|
| token | token JWT | — |
Requires Deno, Node.js or Bun. With Deno the script runs with no permissions: it cannot read files or access the network. Central Bank indicators are from the day the site was published.
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