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OnePreview: File Viewer

OnePreview: File Viewer

Markdown, Code, JSON & ZIP

1 ratings
3 reviews
🔧 Utilities
📊 Productivity
Free

Details

Released
March 25, 2026
Updated
November 8, 2026

Features

Developer

培克 罗
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OnePreview: File Viewer screenshot #1 for iPhone
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OnePreview: File Viewer screenshot #7 for iPhone
iphone
iphoneDuo
ipad
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About

View and export various file types like Markdown, code, and archives locally on your device. Create PDF reports from Markdown files with advanced rendering options. Inspect data and code without direct editing.

✓Preview Markdown with code highlighting
✓Render Mermaid diagrams and KaTeX formulas
✓Export Markdown to A4 PDF reports
✓Inspect SQLite databases and ZIP archives
✓Supports over 20 file formats
✓Local-first, no account required
Show original description
+1

What's New in OnePreview

1.4.8

November 8, 2026

1. Refined preview layouts and mode controls on iPhone Duo. 2. Improved button layouts for larger text and localized interfaces.

User reviews

Most RecentHighest RatedLowest Rated

Useful!

I use OnePreview for quickly checking files.

Update — October 6, 2026
My previous requests have been addressed in version 1.4.2. Thank you!

1. Files can now be opened directly from OnePreview.
2. Switching views and scrolling through longer files is now much smoother and more stable.
⎋⎋

Response from developer

Hi, thanks for the thoughtful suggestions. OnePreview 1.4.2 is now available with an **Open File** button for previewing files directly in the app. We’ve also improved switching to and scrolling through Raw Text in longer files. We appreciate you helping us make OnePreview better!

意外发现了这款软件

和 codex 的对话记录打不开，stroe 推荐了这个软件，实测能打开
Yyahswd

Response from developer

感谢支持！很高兴 OnePreview 帮你顺利打开了 Codex 的对话记录。我们会继续完善格式兼容和预览体验，有问题欢迎随时反馈。

不错的软件，比那些收费的好用多了

文件预览很方便，格式支持多，用起来挺顺手
PPK3453

Response from developer

感谢认可！很高兴 OnePreview 能让文件预览更方便、更顺手。我们会继续优化体验，并支持更多实用格式。

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FAQ

Does OnePreview have ads?

No, OnePreview is ad-free. It does not contain any advertisements, providing an uninterrupted user experience.

What file formats does OnePreview support?

OnePreview supports a wide range of formats including Markdown (.md, .markdown), MDX, JSON, YAML, XML, CSV, SQLite (.sqlite, .db), ZIP, TAR.GZ, and many source code files. It also offers syntax highlighting for popular programming languages.

Can I export files from OnePreview?

Yes, you can export Markdown files to A4 PDF reports. The export process preserves formatting such as table headers, wrapped code, Mermaid diagrams, and KaTeX formulas.

Is OnePreview available on Android?

Currently, OnePreview is available for iPhone and iPad. The supported devices listed are Mac, iPhone, and iPad.

How does OnePreview handle file processing?

OnePreview is a local-first file viewer, meaning all document content is processed on your device. No account is required, and it operates without needing an internet connection for core viewing functions.

What is the update frequency for OnePreview?

The app was last updated on November 8, 2026, with version 1.4.8. This indicates a relatively recent update, suggesting ongoing development and support.

Can I edit SQLite databases with OnePreview?

OnePreview allows you to inspect SQLite schemas and sample rows without directly editing the database. It's designed for viewing and understanding data rather than modification.

What is the age rating for OnePreview?

OnePreview has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain mature content.