Mark - Markdown Viewer

Preview & edit Markdown files

Only for Mac

Free

Mac

Press Space on any Markdown file in your file explorer and see it fully rendered, diagrams and math included. No app to open. Need changes? Edit with a live preview. Read Markdown without opening anything. Select a .md file in Finder, press Space, and Mark shows it fully rendered, exactly as it would look on GitHub: headings, tables, code, diagrams and math. Your Markdown files even get real thumbnails, so you can recognize them at a glance. When you want to change something, open the file in Mark: a fast, native viewer and editor with a split view and live preview. PREVIEW WITHOUT OPENING THE APP • Press Space on any Markdown file in Finder for a full rendered preview, no app launch needed • Diagrams, math and syntax-highlighted code render right inside Quick Look • File icons show a miniature of the document instead of a generic text icon • Works in Finder, the Open dialog, Spotlight and anywhere else macOS uses Quick Look • Safe by design: previews block every remote request, so a file can't phone home just because you looked at it GITHUB-FLAVORED RENDERING • Tables, task lists and strikethrough, styled with GitHub's own stylesheet • Syntax highlighting for code blocks, with light and dark themes • Mermaid diagrams: flowcharts, sequence diagrams, Gantt charts and more • Math with KaTeX: inline and display equations, rendered offline WRITE THE WAY YOU LIKE • Three modes: preview, split view with synced scrolling, and editor (⌘1 / ⌘2 / ⌘3) • A native, Markdown-aware editor with live highlighting • Formatting shortcuts: ⌘B bold, ⌘I italic, ⌘K link, ⇧⌘C inline code • Click a task-list checkbox in the preview and the source updates FIND YOUR WAY • An outline sidebar built from your headings: click to jump • Find in the preview or in the editor (⌘F) • Live word count and reading time SHARE AND PRINT • Export to PDF or standalone HTML • Print with the rendered styling PRIVATE BY DESIGN • No accounts, no analytics, no tracking • Everything renders locally and works fully offline • All HTML is sanitized before it is displayed Light, dark or system appearance.

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The developer, Intro Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Accessibility

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    Information

    Seller
    INTROINI SAS
    Size
    1.3 MB
    Category
    Productivity
    Compatibility
    Requires macOS 14.0 or later.
    • Mac
      Requires macOS 14.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Intro Labs
  • Developer Website
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