What does JWT Decoder do?
Inspect JWT header and payload data without sending it away. The workspace keeps the input and result together, making it easy to check the change before you use it elsewhere.
For example, you can inspect JWT header and payload data without sending it away before adding a transformed value to code or configuration.
What you can control
JWT Decoder stays deliberately simple: add the content, run the tool, and review the result.
How to use JWT Decoder
- 1
Paste or type the content you want to work with.
- 2
Review the content and correct anything you do not want carried into the result.
- 3
Run JWT Decoder, review the output, then copy or download it where available.
Tips for a better result
- Keep the source content beside the JWT Decoder output so you can check the transformation.
- Read the complete result rather than relying on the first line or preview alone.
- Treat decoded or formatted output as data, not proof that the source is safe or authentic.
Frequently asked questions
Is my input private when I use JWT Decoder?+
JWT Decoder handles the pasted value locally in this browser. Avoid using real production secrets on an untrusted or shared device.
What should I check after using JWT Decoder?+
Treat decoded or formatted output as data, not proof that the source is safe or authentic.