One Markdown

One Markdown is a fast and lightweight editor that supports plain text, Markdown and Textbundle. Built on CommonMark with GitHub Flavored Markdown (GFM), it offers a full range of features including TOC, tables, code blocks, math formulas, task lists, footnotes, and in-place rendering. Images display directly in the editor, and Mermaid and ECharts visuals can be previewed. Users can customize fonts and themes, use a Markdown syntax toolbar, and access iOS-specific input support. It also provides tools for generating and formatting tables, along with outline and word count views.