Converting HTML + JavaScript to an exe
Welcome to 2019!
There's all kinds of different ways to accomplish this now. One popular npm package is npm pkg. There's also the popular Electron (this is what vscode was built on), and quite a few others
You Could always turn the HTML file into a HTA file and then convert it into an exe :)
https://www.vbsedit.com/
Most easiest way is:
1) Download Visual Studio Express Edition(Because it's free).
2) File -> New Project -> Windows Forms Application.
3) Load your current HTML into it.
4) Add WebBrowser control to your project.
5) Deploy your application(Build -> Publish).
Note: The WebBrowser Control use IE by-default. Take a look at this alternative as well.
You can create a Windows app from HTML/JS.
Actually it's one of my pet projects:
Scriptonit
I've been using it for a while to create tools for myself, but just recently I decided to make it a proper freeware product. If you're not looking for something very complex and you don't need lots of frameworks & modules, this might be just what you're looking for.
You can download Scriptonit here.