To host an HTML ZIP file, the archive must contain a complete browser-ready website. The browser needs HTML plus every CSS file, script, image, font, and download that the pages reference.

Make index.html the first thing the host can find

The homepage file must be named index.html and live at the root of the archive. This is correct:

portfolio.zip
├── index.html
├── about.html
├── css/site.css
└── images/headshot.jpg

This is not:

portfolio.zip
└── portfolio-final/
    └── index.html

If you already made the second kind of ZIP, extract it, open the inner folder, select its contents, and create a new archive.

Check links before publishing

Use relative paths for files included in the ZIP. For example, <link rel="stylesheet" href="css/site.css"> works when the CSS folder is included. A link such as C:\Users\you\Desktop\site.css or file:///Users/you/site.css will not work for visitors.

After upload, visit the live URL in a private browser window. Test the homepage, navigation, a page that contains images, and the mobile layout. If the homepage opens but other pages fail, check letter case too: Linux hosting treats Logo.png and logo.png as different files.

Once the ZIP deploy looks right, attach your domain and use the HTTPS address for sharing. The upload is the release: make a new ZIP whenever you want to publish a new version.