JWT

JWT Decoder

Decode JWT header and payload without uploading tokens.

How to Use

  1. Paste the JWT string into the input area.
  2. Decode the token header and payload locally.
  3. Review or copy the formatted JSON output.

Frequently Asked Questions

Is my data uploaded?
No. Processing runs locally in your browser, so your files and text do not leave your device.
How do I decode a JWT?
Follow the steps above to decode a JWT. The result is generated directly in your browser.
Is this tool free?
Yes. It is free to use with no signup.
Can I use it on mobile?
Yes. The interface works on modern mobile browsers, tablets, and desktop browsers.
What should I know about large files?
Large inputs depend on your device memory and browser performance. If a file is very large, try processing fewer items at once.
Which browsers work best?
Current versions of Chrome, Edge, Safari, and Firefox are recommended.