JWT
JSON Web Token
Build and sign a JWT
Edit the header and payload, choose an algorithm, and sign with your secret — all in your browser.
HS256
For this tool: header, payload, secret, and generated tokens stay client-side.
Local processing / privacy notice
- Inputs are processed in your browser session.
- We do not send raw input/output values to our analytics endpoint.
- Use reset/clear actions when working with confidential data.
For this tool: header, payload, secret, and generated tokens stay client-side.