Structure the ZIP
- index.html at the root of the archive, not inside an extra folder.
- Relative paths for assets, for example css/style.css and img/logo.png.
- No server-side code — only static files run.
Size limits
Every file counts toward the extracted total. Free sites allow 20 MB; Starter, Pro and Business allow 50 MB, 100 MB and 200 MB per site. Free uploads also share a daily allowance across all free users.
Publishing from scripts or agents
The HTML to URL API accepts a single HTML document as JSON or a static-site ZIP as a multipart upload, and returns the live URL — see the API docs.