Try it online: https://brandis.io

This app is intended to illustrate the ease with which secure, end-to-end encryption can be achieved in modern web browsers, using only a small amount of JavaScript code. Brandis does not implement encryption itself; instead, it relies on the Web Cryptography API provided by your browser, and simply exposes a user interface to this API that enables its use by non-programmers.

To get started, generate a public/private keypair using the button at the top, and follow the instructions from there.

The source code for this app is in the public domain, and can be accessed on GitHub. We recommended that you download this page to your computer and use it offline. If you're a programmer, you can inspect the source code to check for backdoors.

Note: Currently the app only works on the latest desktop versions of Firefox, Google Chrome.

Brandis is primarily intended as a demonstration; it was put together in less than a day. For real-world usage, we recommend more established software such as GnuPG.