JWT Builder
Create unsigned JSON Web Tokens or sign with HS256 directly in your browser.
alg=none
Used only in your browser. Never sent anywhere.
Ready.
FAQ
Is this tool server-side or client-side?
Client-side only. JWT encoding and signing run entirely in your browser using JavaScript and Web Crypto.
What if my JSON is invalid?
The tool validates both header and payload JSON in real-time and shows errors until corrected.
Can I use this for production secrets?
Use caution and your organization’s security policies. This is a convenience builder for development/testing workflows.