HTML Reader Offline vs OneOpen

Open HTML files and ZIP websites on iPhone and iPad — completely offline. No account, no tracking, no ads. HTML Reader Offline turns your device into a portable library for local web content. Save a tutorial, a documentation site, an exported notebook or any .html / .zip bundle, then read it anywhere: on a plane, on the subway, or somewhere with no signal at all. WHY IT'S DIFFERENT • Truly offline. Files live on your device. Nothing is uploaded and no connection is ever required. • Single files or whole sites. Import one .html page, or a ZIP bundle with its CSS, scripts and images intact. • A private space per document. Each document loads in its own isolated storage area, so two tutorials never overwrite each other's saved state or progress. • Fits every screen. The interface adapts to the actual display — compact on a phone, spacious on an iPad or a folding phone's inner screen. READING THAT GETS OUT OF THE WAY • Automatic table of contents built from the page headings — jump to any section in one tap. • Full-text search inside the page, with a match counter and one-tap navigation between hits. • Bookmarks for the passages you want to return to. • Highlights in five colours, each with an optional note; they stay anchored to the text through font changes and rotation. • Adjustable font size, light / dark / sepia themes, and a subtle progress bar. • Reopens exactly where you left off. A LIBRARY YOU CAN ACTUALLY MANAGE • Folders with drag-and-drop, so documents stay organised. • Library-wide search: look across every document at once and land straight on the matching paragraph. • Reading statistics: total time, today's time, your daily streak, and a 7-day chart. • Backup and restore: export the entire library — documents, progress, bookmarks, highlights and settings — into one ZIP file, and bring it back whenever you need it. SHARE WHAT YOU'RE READING • Send a document to anyone as a single .html file, or as a ZIP bundle they can open in any browser or re-import into the app. PRIVACY, PLAINLY No sign-up, no analytics, no advertising, no third-party trackers. The app never makes a network request for you, and your files never leave your device. Tip Jar (optional): Settings → Tip Jar offers a one-time, voluntary tip. It unlocks nothing — every feature in the app is free for everyone. Have a question or an idea? The support link below reaches me directly.

OneOpen opens the files you receive from Files, Mail, and other apps. Everyday viewing stays free and local. FREE FILE VIEWING Open HTML and ZIP website packages as isolated mini apps. Read Markdown, PDF, Office and iWork documents, common images, audio, video, JSON, YAML, XML, CSV, source code, and text. Search and edit common text formats in a separate copy; your original remains untouched. Recents and widgets put your files within reach. ADVANCED FORMATS Advanced Access unlocks specialized previews: 3D models, RAW and design images, fonts, certificates, property lists, email, subtitles, contacts, calendars, specialist archives and data, CAD and circuit files, and the binary inspector. Choose an annual subscription or a one-time lifetime purchase; both unlock the same features. PRIVACY AND HTML SAFETY OneOpen has no account, ads, analytics, or document uploads. Non-HTML previews stay offline. Imported HTML and ZIP websites may run JavaScript and connect to HTTPS/WSS servers in an isolated WebKit store. Switch to offline mode or Safe Preview at any time; HTTP, embedded frames, unexpected navigation, and access to other local files remain blocked. Webpage code may contact third-party servers when you allow network access. Terms of Use: https://oneapps.studio/terms Privacy Policy: https://oneapps.studio/privacy Advanced Access includes STEP/STP, IGES, BREP, DXF, STL, OBJ and PLY geometry previews. Unsupported drawing entities are disclosed; external OBJ materials and textures are not loaded. This is a viewer, without CAD editing or engineering measurements.