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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
October 16, 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
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About

This app allows you to preview and interact with various developer file formats, including Markdown, code, databases, and archives, directly on your iPhone and iPad. It offers local processing for speed and privacy, with features like PDF export and structured data inspection.

✓Markdown and MDX rendering
✓JSON, YAML, XML, CSV, TSV, TOML, ENV parsing
✓SQLite database inspection
✓Source code and log viewing
✓ZIP and TAR.GZ archive content preview
✓Mermaid diagrams and KaTeX math rendering
✓A4 PDF export for Markdown files
Show original description
+1

What's New in OnePreview

1.4.5

October 16, 2026

1. A refreshed interface with dedicated Files, Settings, and Help pages. 2. Improved folder and SQLite previews, reliability, and Markdown PDF export.

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

What file types can OnePreview preview?

OnePreview supports a wide range of file types including GitHub-style Markdown, MDX, TextBundle, TextPack, JSON, JSONL, YAML, XML, CSV, TSV, TOML, ENV, SQLite databases, source code, plain text, logs, and ZIP/TAR.GZ archives.

Does OnePreview require an account?

No, OnePreview is designed for local-first processing and does not require an account to use its features. This ensures your data remains private and processing is fast.

Can I export my Markdown files from OnePreview?

Yes, you can export standard Markdown files as A4 PDF reports. This feature allows you to preview rendered content, including table headers, wrapped code, Mermaid diagrams, and KaTeX formulas, before saving the PDF.

How does OnePreview handle structured data?

OnePreview allows you to inspect structured data formats like JSON, YAML, and XML, as well as view SQLite database schemas. This makes it easier to understand and work with complex data directly on your device.

Is OnePreview available on Mac?

Yes, OnePreview is supported on Mac, iPhone, and iPad, allowing for a consistent file previewing experience across Apple devices.

How often is OnePreview updated?

The latest version of OnePreview, 1.4.4, was released on October 10, 2026. Updates are provided to ensure compatibility and introduce new features or improvements.

What is the age rating for OnePreview?

OnePreview has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be exploring developer-related content.

Does OnePreview have ads?

No, OnePreview is ad-free. As a free application, it does not contain advertisements, providing an uninterrupted user experience.