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!