# OpenMark

> A native markdown editor for Mac, iPhone, and iPad with Mermaid diagrams, LaTeX math, writing modes, and Liquid Glass design.

OpenMark is a markdown editor built specifically for Apple platforms using SwiftUI. It opens .md files and renders them beautifully with support for Mermaid diagrams, LaTeX math (via KaTeX), syntax highlighting, interactive checkboxes, and export to PDF and HTML. One $9.99 purchase gets you Mac, iPhone, and iPad.

## Key Facts

- Platform: macOS (Tahoe / macOS 26+), iOS 18+ (iPhone and iPad)
- Price: $9.99 one-time Universal Purchase on the App Store
- App size: ~8 MB
- No subscription, no account required
- Built with SwiftUI, Liquid Glass design
- Opens .md, .markdown, .mdown, .mkd, .mkdn, .mdx files
- No tracking, no analytics, no cookies

## Features

- Two view modes: Document view (rendered preview) and Markdown view (code editor)
- Mermaid diagrams render inline (flowchart, sequence, gantt, pie, mindmap, etc.)
- LaTeX math renders inline via bundled KaTeX
- Syntax highlighting for 30+ languages
- Focus Mode — dims all except current paragraph (⌘⇧F)
- Typewriter Mode — keeps cursor vertically centered (⌘⌃T)
- Zen Mode — hides all UI chrome (⌘⇧Z)
- 4 editor themes: Default, Nord, Solarized Dark, One Dark
- Image paste (⌘V) and drag-and-drop
- Move lines up/down (⌥↑/⌥↓)
- MDX file support
- Table of Contents generation
- Command Palette for quick actions
- Spotlight Indexing via native Spotlight Importer (macOS and iOS)
- Apple Intelligence support
- Shortcuts & Automation integration
- Export to PDF and HTML
- Keyboard-first design with full shortcut support
- Dark mode with multiple themes
- Offline and fully private — no data leaves your devices

## iOS Features

- Full markdown rendering with Mermaid and LaTeX
- iPad split view with table of contents sidebar
- iCloud document support
- Home screen Quick Actions
- Siri Shortcuts integration
- Works completely offline

## Links

- Website: https://openmarkapp.com
- Privacy Policy: https://openmarkapp.com/privacy
- Blog: https://openmarkapp.com/blog
- Support: https://github.com/mcdonaldryn/openmark/issues