# OneOpen: File Viewer — HTML, PDF & More

> HTML, PDF & More (iPhone/iPad app by Freedom Dimension (shenzhen) Technology Co., Ltd.)

- Source: https://appshunter.io/ios/app/oneopen-file-viewer/id6792251542 (this page in markdown: same URL + `.md`)
- Developer: [Freedom Dimension (shenzhen) Technology Co., Ltd](https://appshunter.io/developer/6776064465)
- Category: Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 12 MB
- Languages: Chinese (Simplified, China), German (Germany), Japanese, French (France), Chinese (Traditional, Taiwan), American English, Brazilian Portuguese, European Spanish, Arabic, Korean
- Released: 2026-07-28
- Data updated: 2026-09-27
- User reviews in markdown: https://appshunter.io/ios/app/oneopen-file-viewer/id6792251542/reviews.md

## What is OneOpen?

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


## Version history (last 5 releases)

### 1.7 — 2026-09-25

OneOpen now offers optional Advanced Access for specialized file formats, with annual or lifetime unlock. Everyday formats, including HTML and ZIP websites, remain free. Added 10 app languages, including Simplified and Traditional Chinese.

### 1.6 — 2026-08-11

• HTML and ZIP websites now fill the screen, hide the status bar by default, and use plain Back and More icons with no button rings.
• Every recent file is available to widgets; each widget can choose its own file, name, and icon.
• Cold widget launches go straight to the file without flashing the app home screen.
• Files up to 100 MB are copied into Imports by default so Recents keep working; this can be disabled in Settings.
• Redesigned the World Clock, Focus Timer, and Memory Match mobile HTML mini apps.

### 1.5 — 2026-08-07

NEW
• Run trusted HTML and ZIP packages as interactive mini apps.
• Local JavaScript starts with network access blocked; HTTPS and secure WebSockets require a separate confirmation.
• Cookies, cache, localStorage, and IndexedDB are isolated per file and can be cleared at any time.
• Try three new self-contained mini apps: Aurora Clock, Focus Timer, and Memory Match.

SAFE BY DEFAULT
• Imported HTML and ZIP packages still open in Safe Preview with active code and remote resources blocked.
• Remote page navigation opens outside OneMarkup.

The example library now includes 29 items covering every preview category and the new HTML runtime.

### 1.3 — 2026-07-28

Edit the files you open and let OneMarkup save your changes automatically to a clear working copy in Files. The original stays untouched, so you can explore and revise with confidence.

New
• Edit Markdown, HTML, SVG, JSON, YAML, XML, subtitles, and other text-based files.
• Preview JSON and XML as structured views, YAML with line numbers, and SRT subtitles as timed cue cards.
• Add “Quick Preview Here” to the share sheet to inspect a file without leaving the current app.

Improved
• Share, open, and Recents flows now keep originals and edited copies clearly separated.
• More reliable handling for files from WeChat and other providers.

Fixed
• Quick Preview now handles back-to-back requests and more provider representations reliably.

### 1.0 — 2026-07-28

No release notes.

## Apps similar to OneOpen

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Bamboo Lite](https://appshunter.io/ios/app/bamboo-lite/id6782273806) | — | Free | Productivity |
| [OpenFile - Preview any File](https://appshunter.io/ios/app/openfile-preview-any-file/id6761735517) | 5.0 (2) | Free | Productivity |
| [QuickSheet - Grid Editor](https://appshunter.io/ios/app/quicksheet-grid-editor/id6796057819) | — | Free | Productivity |
| [Lootpad – Instant Notes](https://appshunter.io/ios/app/lootpad-instant-notes/id6747711980) | — | Free | Productivity |
| [TagingVault](https://appshunter.io/ios/app/tagingvault/id6771379530) | — | $2.99 | Productivity |
| [Notedown: Markdown Notes](https://appshunter.io/ios/app/notedown-markdown-notes/id6785522355) | — | Free | Productivity |

## More apps by Freedom Dimension (shenzhen) Technology Co., Ltd

- [OnePhoto: Photo Cleaner](https://appshunter.io/ios/app/onephoto-photo-cleaner/id6779493280)
- [OneZen Med](https://appshunter.io/ios/app/onezen-med/id6780318004)
- [OneUke](https://appshunter.io/ios/app/oneuke/id6783200326)
- [返航](https://appshunter.io/ios/app/id6787702158)
- [OneStarter](https://appshunter.io/ios/app/onestarter/id6787966863)
- [OneHabit: Habit Tracker](https://appshunter.io/ios/app/onehabit-habit-tracker/id6788409678)

All apps by Freedom Dimension (shenzhen) Technology Co., Ltd: https://appshunter.io/developer/6776064465

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-27.*