A clean, fast PDF reader with smooth scrolling, pinch to zoom and page-to-page navigation, in the same app that opens your local websites.
A local documentation set is rarely all HTML. There is usually a specification, a manual or an appendix sitting next to it as a PDF. Switching apps to read it breaks the thread, and the link that pointed to it stops meaning anything.
Pagira opens PDFs in a clean, fast reader: smooth scrolling, pinch to zoom, and easy navigation from page to page. Nothing to configure, no import step, no conversion.
Tap a link to a PDF from inside an HTML page and it opens right there. Swipe back and you are on the page you came from. The document is part of the site rather than a detour out of it.
Because both live in the same app, a folder mixing HTML and PDF stays coherent. You do not maintain two reading habits, and offline behaviour is identical for both.
You do not need a website around it. Open a PDF on its own from Files or any app, and it lands in the same reader.