One Markdown is a simple and fast editor that supports plain text, Markdown and Textbundle. It has the following features:

1. Fully supports CommonMark standard and GitHub Flavored Markdown (GFM).

2. The same basic library is used for syntax highlighting and parsing into HTML, and there will be nice with editing and previewing. After testing, the performance has also been greatly improved, and editing documents with millions of characters is ok.

3. In the editing and preview mode, the edited content and the previewed content can now be accurately aligned, and the performance is greatly improved due to the use of WKWebView.

4. Supports the display of images in the Editor. Supports jpeg, png, gif, webP, HEIC and other formats.

5. Supports the creation and editing of Textbundle documents.

6. Support mathematical formulas, Echarts, mermaid.

PS: The lightweight choice is One Markdown. If you need a complete and powerful app, please take a look at MWeb, I hope you like it!

What’s New

Version 1.1.9

* Fix the bug that the local image in HTML syntax are not displayed in the preview mode.
* The shortcut setting can now select the "MWeb3" option. After selection, the shortcut key will be exactly the same as MWeb.
* Other bug fixes and improvements.

Ratings and Reviews

5.0 out of 5
5 Ratings

5 Ratings

Hsowhudjwhhdjehwheue ,

I like the outline view!

we can jump tags real quick. This app is like a better version of Pretext. However, the preview mode doesn’t support dark mode. And there’s no toc support either, like the one in MWeb

Imericxu ,

Great UX and top-notch synchronized preview

Supports MathJax, has everything you expect, and even has split preview with synchronized scrolling!

marlowe310 ,

Excellent Light Weight MD Editor

I love mweb and use it regularly but it’s a bit cumbersome for some tasks. One Markdown is the perfect gap filler. All the same stability and tools in a single-purpose package.

If it could support the mweb styles (themes) as well, that’d make it near perfect!

App Privacy

The developer, ou lvhai, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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