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OneOpen: File Viewer

OneOpen: File Viewer

HTML, Markdown, CAD & 3D

0 ratings
7 reviews
📊 Productivity
Free
In-App Purchases

Details

Released
July 28, 2026
Updated
November 4, 2026

Features

Developer

Freedom Dimension (shenzhen) Technology Co., Ltd
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OneOpen: File Viewer screenshot #1 for iPhone
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About

View a wide range of file types, including documents, web pages, CAD drawings, and 3D models, directly on your iPhone and iPad. Easily open and manage archives, EPUBs, emails, and certificates. Offers basic viewing for free with advanced features available through a subscription.

✓Multi-format file viewing
✓HTML and Markdown preview
✓CAD and 3D model rotation
✓Archive browsing and extraction
✓EPUB reader
✓Certificate inspection
✓File information display
Show original description
+1

What's New in OneOpen

1.9.6

November 4, 2026

Improved opening and extraction for ZIP and 7z archives. Added more filename encodings for older ZIP files, plus on-device export and conversion for supported documents.

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1

Subscriptions & In-App Purchases

Advanced Access Annual

Specialized file previews for one year.

$0.991 Year
How to cancel OneOpen subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

想看大压缩文件

大的看不了
JJungle健鸽

限免购买的，提示购买成功，无法验证购买，恢复购买，显示无法恢复购买？

限免购买的，提示购买成功，无法验证购买，恢复购买，显示无法恢复购买？
？？不出呢

Response from developer

非常抱歉让你遇到验证和恢复失败。请先不要重复付款，建议更新到1.9.1版本，确认登录的是当时获取限免的同一个Apple账号，再点一次恢复购买试试。如果还是不行，请把App名称、系统版本和报错截图发到 contact@oneapps.studio 联系我处理。

多文件查看阅读器

很棒的一款多格式文件查看器，比wps支持格式更多，更好用，极力推荐。
与与英语一哦

Response from developer

谢谢认可和推荐！很高兴能在日常看各种文件时帮上忙，后续我也会继续改进细节。

很不错的应用，支持的格式很多。

CAD只支持dxf格式，求支持dwg格式。
LLaB（元素周期表）

Response from developer

目前的1.9.1版本已经支持DWG格式的离线二维预览了，可以缩放、平移和开关图层。不过复杂的三维实体或超大图纸还不一定能完整显示，也暂不支持编辑和测量，欢迎更新试试。

朕已阅，确实阅得舒服

不只是“看文件”，还能跑可信 HTML/ZIP 网页包、编辑文本类文件、做小组件、隔离网页存储、不收集数据，还支持3D、RAW/设计图、证书、专业压缩包、CAD、二进制检视这类专业格式的文件查看，太方便啦。
Ppingguo

Response from developer

谢谢这么详细的反馈！很高兴网页包运行和各类专业格式查看这些功能在日常里对你有帮助。

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FAQ

What file types can OneOpen view for free?

OneOpen offers free viewing for a wide range of everyday files including PDF, Office/iWork documents, images, audio/video, JSON, XML, YAML, CSV, code, and text. You can also freely browse and extract from ZIP and EPUB archives.

What are the advanced features in OneOpen?

Advanced features require an 'Advanced Access' subscription and include viewing and interacting with CAD drawings (DWG/DXF) and various 3D model formats (STEP, IGES, STL, OBJ, PLY, GLB/glTF, USDZ). It also enables browsing of more archive types beyond ZIP and EPUB.

How much does OneOpen cost?

The core functionality of OneOpen is free to use. For advanced features like CAD and 3D model viewing, an 'Advanced Access Annual' subscription is available for $0.99 per year.

Does OneOpen have ads?

No, OneOpen is ad-free. The app does not contain advertisements, ensuring an uninterrupted viewing experience for all users.

What devices does OneOpen support?

OneOpen is designed for Apple devices and is compatible with both iPhone and iPad.

How often is OneOpen updated?

The latest version of OneOpen is 1.9.6, and it was last updated on November 4, 2026. Updates are released to improve functionality and add support for new features.

Can I open files from other apps with OneOpen?

Yes, OneOpen integrates with iOS's document sharing capabilities. You can open files from apps like Files, Mail, and any other app that supports document sharing.

Does OneOpen support offline viewing?

Yes, OneOpen supports offline viewing for many file types, including HTML, Markdown, and EPUB. Specific options like 'Safe Preview' for HTML also enhance offline capabilities.