Mark: light MD editor for AI

WYSIWYG markdown, 11 MB

Only for Mac

Free

Mac

A native Mac Markdown editor that stays out of your way: 11 MB, ~61 MB RAM, live reload for AI agents. No Electron. Mark is a native macOS Markdown editor built around one idea: your editor should be the cheapest window you have open. ULTRALIGHT The whole app is 11 MB (28 MB installed), uses ~61 MB of RAM at idle and opens in under a second. No Electron, no bundled browser — Mark renders through the system WebKit your Mac already runs. WYSIWYG, NOT FRAGILE SOURCE Rich editing with live-rendered tables, Mermaid diagrams, KaTeX math and syntax-highlighted code — plus a source mode when you want it. 21 themes from Cadmium Light to Synthwave '84. BUILT FOR AI WORKFLOWS Your agents write Markdown to disk; Mark re-renders instantly with the cursor preserved, so you can jump back in the moment a pass finishes. An opt-in localhost live-viewer endpoint lets local tools stream document updates as the agent types. FOR HUMANS TOO Project sidebar with file tree, tabs, fuzzy search, diff view, spell checking, and Copy as HTML / Plain Text for pasting clean formatting straight into email. PRIVACY No account, no analytics, no telemetry. Your documents never leave your machine. Open source (MIT): https://github.com/xronocode/mark

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

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    Information

    Seller
    Mikhail Yevdokimov
    Size
    9.4 MB
    Category
    Developer Tools
    Compatibility
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Mikhail Yevdokimov (xronocode)
  • Developer Website
  • Privacy Policy