MarkEdit

MarkEdit is an open‑source Markdown editor built specifically for macOS. It provides a native, lightweight text‑editing experience that adheres to the GitHub Flavored Markdown specification without adding proprietary syntax. The editor leverages CodeMirror 6 for features such as multi‑caret support and code folding, and it integrates tightly with macOS UI elements like force‑touch word lookup and inline predictions.

The application targets users who need a fast, privacy‑focused tool for handling large Markdown documents, including files of several megabytes, while keeping the installer size around 4 MB. It offers extensibility through CSS, JavaScript, and CodeMirror extensions, with official add‑ons for preview panes, custom theming, and Apple Intelligence‑based writing assistance.

MarkEdit distinguishes itself by balancing size, speed, native macOS integration, and correct Markdown parsing. It does not collect user data, supports AppleScript and Shortcuts, and can be installed via a DMG or Homebrew cask, with automatic update checks and version history available on GitHub.