npm jwt-decode
npm jwt-decode decodes a JWT header and payload and shows the algorithm and claim status, without verifying the signature. Free and private.
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How to use npm jwt-decode
- Enter or paste your JWT into the input field to begin.
- npm jwt-decode updates the output automatically as you type.
- Finish by choosing Copy to take the output with you.
About this tool
npm jwt-decode runs entirely in your browser. npm jwt-decode decodes a JSON Web Token in your browser, showing the header and payload without verifying secrets remotely.
Signature verification that needs a secret should be done in a trusted environment; npm jwt-decode focuses on decoding. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
How do I use npm jwt-decode?
npm jwt-decode lets you decode your input right in the browser, with the result shown instantly and nothing uploaded.
Is npm jwt-decode free to use?
Yes — npm jwt-decode is completely free, with no usage limits.
Where is my data processed by npm jwt-decode?
Entirely in your browser — npm jwt-decode keeps your data on your own machine and sends nothing anywhere.
Does npm jwt-decode verify the JWT signature?
npm jwt-decode decodes the token locally so you can inspect its header and payload; verification needs the matching key.
Does npm jwt-decode work offline?
Once the page has loaded, npm jwt-decode keeps working with no network connection.