Homepage: wikihub.md/openmarkdownreader

A beautiful, open-source Markdown file reader and editor for Mac built with Electron.

• Clean, GitHub-style markdown rendering
• Syntax highlighting for code blocks
• Dark mode support (follows system preference)
• Drag and drop file support
• Native Mac title bar with traffic lights
• Multi-tab and multi-window support
• Edit mode with live preview toggle (⌘E)
• File browser sidebar with folder navigation
• Adjustable content width
• GFM (GitHub Flavored Markdown) support including:
  • Tables
  • Task lists
  • Strikethrough
  • Autolinks

npm start

• ⌘O - Open file
• ⌘T - New tab
• ⌘W - Close tab
• ⌘E - Toggle edit mode
• ⌘S - Save
• ⌘B - Toggle sidebar
• Escape - Cancel/revert edits
• Ctrl+Tab - Next tab
• Ctrl+Shift+Tab - Previous tab

1. Open a file: Click "Open File" or press ⌘O
2. Drag and drop: Drop a .md file onto the window
3. Edit: Press ⌘E to toggle edit mode
4. Browse folders: Click the sidebar toggle and open a folder

• .md
• .markdown
• .mdown
• .mkd
• .txt

The app is large because Electron bundles a full Chromium browser. This is standard for Electron apps (VS Code, Slack, Discord are similar sizes). The universal binary (ARM + Intel) doubles the size.

Potential optimizations (no current intent to implement):

• Build single-architecture versions (~100MB each for ARM or Intel separately)
• Port to Tauri (~15-20MB) which uses the system webview instead of bundling Chromium
• Port to Neutralino (~3-5MB) for even smaller size

For now, the convenience of Electron's development experience outweighs the size concern.