MarkView

Native macOS markdown preview with MCP server for Claude Code. Claude writes markdown — MarkView renders it live, in a real native window, while you work.

Versions: The macOS app (app badge) and the npm MCP wrapper (npm badge) are versioned independently. App releases happen when the Swift binary changes; npm patches happen for MCP server improvements. Both badges always show the latest of each.

Preview only	Editor + Preview

Quick Start — Claude Code

One command to wire MarkView into every Claude Code session:

claude mcp add --transport stdio --scope user markview -- npx mcp-server-markview

That's it. Claude can now call preview_markdown to render any markdown string in a native macOS window, or open_file to open any .md file directly.

Claude Desktop Setup

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "markview": {
      "command": "npx",
      "args": ["mcp-server-markview"]
    }
  }
}

Note: MCP servers belong in ~/.claude.json (Claude Code) or claude_desktop_config.json (Claude Desktop), not ~/.claude/settings.json.

Installation

Homebrew (recommended)

# Full .app with Quick Look extension — Apple notarized, Gatekeeper approved
brew install --cask paulhkang94/markview/markview

# CLI only (builds from source)
brew tap paulhkang94/markview
brew install markview

Build from source

Prerequisites: macOS 14+, Swift 6.0+ (Xcode Command Line Tools)

git clone https://github.com/paulhkang94/markview.git
cd markview
swift build -c release

Install as app (Open With support)

bash scripts/bundle.sh --install

Creates MarkView.app in /Applications and registers it with Launch Services for right-click > Open With in Finder.

Install CLI

bash scripts/install-cli.sh

Creates mdpreview and md symlinks in ~/.local/bin/.

Usage

CLI

mdpreview README.md       # Open a file
mdpreview                 # Open empty editor

Finder

Right-click any .md, .markdown, .mdown, .mkd file > Open With > MarkView

Programmatic

open -a MarkView README.md

Features

• GitHub Flavored Markdown via swift-cmark (tables, strikethrough, autolinks, task lists, footnotes)
• Mermaid diagrams — flowcharts, sequence, Gantt, ER, and pie charts
• Syntax highlighting via Prism.js (18 languages)
• Quick Look integration — spacebar-preview .md files in Finder without opening the app
• Markdown linting with 9 built-in rules and status bar diagnostics
• Live split-pane editor with WKWebView rendering and bidirectional scroll sync
• File watching with DispatchSource — works with VS Code, Vim, and other editors
• Local image rendering — inlines relative paths like ![](https://raw.githubusercontent.com/paulhkang94/markview/HEAD/./image.png) correctly
• Export to HTML and PDF
• HTML sanitizer — strips scripts, event handlers, and XSS vectors
• Drag and drop — drop any .md file onto the window to open
• Find & Replace — Cmd+F / Cmd+Option+F
• Format on save — auto-applies lint fixes
• Auto-save, word count, line numbers, **scrol

... View full README on GitHub