Hi HN, dev here.<p>There are existing projects like CyberChef and DevUtils, but I wanted an offline app that was at least eventually open-source. This also gave me an opportunity to explore Flutter for cross-platform desktop apps. Flutter gives the ability to build native GUI apps for Windows, Linux, MacOS _and_ Web (in case organizations want to self-host it internally for their entire team). The value proposition is unresistable, because the only real alternative seems to be Electron.<p>Mac and Windows builds have been tested. The UI style is standard from the macos_ui package.<p>So far, Flutter has been a pleasant experience but the desktop platform seems not quite ready for prime time. For example, webviews are only supported on Android and iOS.