Unzip File with Good Reader unable to view in Safari

I build a website using HTML. It’s about a simple quiz and I want to be able to browse it offline and show a group. I downloaded a zip file, unzip it with a good reader, but I can't view it in Safari. Viewing through a good reader is a bit less optimal as there are no cookies and the navigation is less user-friendly. How can I fix this thing? Just a few days ago I heard my cousin complaining about the closed file system of iOS, and I just shrugged telling him why would he need an access. Can someone please help me? That is not through loading the html files on the Windows laptop.
