I recently started building an offline, desktop app in Flutter as a collection of dev utilities: https://github.com/nileshtrivedi/devtoolbox

Flutter was a promising choice as it'd give me Windows, Mac OS and Linux build from a single codebase - and even the possibility of orgs running this internally as a self-hosted webapp. But one of the ideas I had was to bundle CyberChef with my app and open in a webview. Turns out, Flutter doesn't support webviews on desktop platforms at all. https://github.com/nileshtrivedi/devtoolbox/issues/4