Search the App Store for “HTML viewer” and you will find a dozen apps that all promise to open your pages. Give them a single page and most of them do. The difference shows the day you open something real: a site exported from a tool, a course, a manual, with its stylesheet, its pictures, its scripts and hundreds of pages linking to each other.
This guide is about choosing the app. If you already have one and want the steps, see how to open an HTML file on iPhone and iPad.
One file, or the whole folder
This is the criterion that sorts all the others. A website is almost never one file: it is a folder, where the page calls a stylesheet, a folder of pictures, scripts, and points at its neighbouring pages. A viewer that only takes the file shows the text without its layout, the pictures missing and the links leading nowhere.
The test takes ten seconds: open the index.html of a site that has a css folder next to it. If the layout appears and the links take you to the other pages, the app reads the folder. If not, it is a file viewer, fine for checking what a file contains, not for reading a site.
What else to check
- Modern JavaScript. Menus, search boxes, charts: many generated sites load their scripts as ES modules or read a JSON file with
fetch, which a browser refuses for a page opened straight from the disk. A viewer that serves the folder the way a web server would runs them; the others show a blank page or a menu that does not open. - Where your files stay. Some apps import a copy into their own storage: two copies, one of which goes out of date. Better to read the folder where it is, On My iPad, in iCloud Drive or on a network share added to Files.
- iCloud Drive and offline. Does the app download the whole folder before showing the first page? On a 2 GB documentation set, that is several minutes. The right behaviour is to bring down only the pages you open, and keep a full copy on the device when you ask for it, before a flight.
- Size. Ten pages say nothing. Try the largest folder you have: some libraries hold 200,000 pages.
- What sits between the pages. PDFs linked from the site, a .zip archive, pictures: does a link to a PDF open in place, with a way back to the page?
- Search. Finding a word across every page of the folder, not just the page on screen.
- Privacy and price. An online viewer uploads your files, which rules it out for client material. Check the account, the subscription, and what the free version actually allows.
The kinds of HTML viewers
| Kind of app | Whole folder | Reads in place | Offline | Made for |
|---|---|---|---|---|
| Files app preview | No | Yes | Yes | Checking a file |
| Code editor with a preview | Often, once imported | Depends on the app | Yes | Writing code |
| Local web server app | Yes | Rarely | Yes | Testing a site you build |
| Online viewer | Rarely | No, files are uploaded | No | A quick look |
| Folder reader such as Pagira | Yes | Yes | Yes | Reading |
None of them is wrong: they answer different needs. If you write HTML, an editor is the right tool. If you read sites, documentation or courses you did not write, you want a reader.
On iPad: reading beside something else
The iPad is where people read large HTML folders: documentation open while they work, a course next to their notes, a catalogue on a customer's counter. What matters there:
- the app working in Split View or Stage Manager, next to another app;
- search results and a book's contents in a side panel, so the page stays in view;
- a hardware keyboard that scrolls the page;
- large folders in iCloud Drive opening without a full download first.
On iPhone: a desktop page on a small screen
Most HTML documents were laid out for a computer screen. On a phone the text gets small, and a white page at night is hard on the eyes. What matters there:
- changing the text size of a web page, and its colours (sepia or dark) and brightness;
- a toolbar you can reach with one hand, and the full toolbar when you turn the phone sideways;
- the same favorites as on the iPad, for the folders kept in iCloud Drive.
Where Pagira fits
Pagira is an HTML viewer built around the folder, on iPhone and iPad:
- it serves the folder locally like a real website: styles, pictures, links between pages, JavaScript including ES modules,
fetchand WebAssembly; - it reads folders where they are, On My iPad, in iCloud Drive or on a network share, with nothing to import;
- in iCloud Drive it streams the pages you open, and Download keeps a full copy for offline reading;
- it opens folders of several gigabytes, PDFs linked from the pages, and .zip archives;
- after Prepare Search, a word is found across every page and every PDF of the folder;
- nothing leaves the device: no server, no account.
The same folders often hold EPUB books, comics or Word files: Pagira reads them too, in the same app.
The trial unlocks everything for 20 document openings; opening a folder doesn't count. After that, a one-time purchase of $11.99, with no subscription, for iPhone and iPad together. Pagira on the App Store.
Frequently asked questions
What is the best HTML viewer for iPad?
The one that opens the whole folder, not just the file. Pagira opens a complete HTML folder on iPad and iPhone, with its styles, pictures, JavaScript and links between pages, offline.
Is there a free HTML viewer for iPhone?
Yes. The Files app previews a single HTML file for free, without its layout or links. Pagira is free to try for 20 document openings, and opening folders doesn't count.
Does an HTML viewer have to import my files?
No. Pagira reads folders where they are: On My iPad, iCloud Drive or a network share added to the Files app.
Can an HTML viewer open a site stored in iCloud Drive?
Yes. Pagira streams only the pages you open from iCloud Drive, and keeps a full copy on the device when you tap Download.
Can an HTML viewer open a very large site on iPad?
Yes. Pagira opens HTML folders of several gigabytes and hundreds of thousands of pages.
Is the same HTML viewer available on iPhone and iPad?
Yes. Pagira is one app for iPhone and iPad: a single purchase covers both.
