SimpleMarkDown

A minimal Markdown editor for macOS with live inline preview no separate pane, the formatting appears directly in the text as you type (Obsidian-style).

Features

• Live inline preview - syntax is hidden when the cursor moves away, rendered inline
• GitHub Markdown syntax supported:
  • Headings H1–H6
  • Bold, italic, bold+italic
  • Strikethrough
  • Inline code and fenced code blocks
  • Blockquotes
  • Unordered and ordered lists
  • Task lists - [ ] / - [x]
  • Tables with column alignment
  • Links and images
  • Horizontal rules
• Settings (⌘,) — theme (system / light / dark), font size, font family
• Open / Save files (⌘O / ⌘S)

Install

1. Download SimpleMarkDown.dmg from the latest release
2. Open the DMG and drag the app to your Applications folder
3. First launch: right-click → Open (required once to bypass macOS Gatekeeper for unsigned apps)

Requirements

• macOS 14 or later

Build from source

• Xcode 15 or later required

1. Clone the repo
2. Open SimpleMarkDown.xcodeproj in Xcode
3. Press ⌘R to build and run