There are a lot of web apps that are being developed these days. Some are called PWAs or progressive web apps. They have the ability to be installed on the users pc or device although they are mostly just a application wrapping a website. My web app needs to save multiple files to a users PC all at one time. My web app is code specific so it writes to the local project source code. It works in the desktop application but now it has to be ported to the web.