qlmd is a Quick Look extension for macOS. Select a Markdown file in the Finder, press the space bar, and see a formatted document instead of raw text.
Coming to the Mac App Store. Requires macOS 15 or later.
In the preview
Rendering happens the moment you press the space bar — no window to open, no app to switch to.
Tables, task lists, strikethrough, and autolinks — the syntax you already write.
Fenced code blocks highlighted by language, in the color theme you pick.
Flowcharts, sequence diagrams, and more, drawn inline from your code fences.
Generated automatically from your headings, so long documents stay navigable.
Shown as a clean summary — or hidden entirely, if you would rather not see it.
Images referenced by relative path appear inline, right where you wrote them.
Made to your taste
The qlmd app is where you set things up: pick a code color theme (Default, Monokai, GitHub, GitHub Dark, One Dark, or Nord), set the text size for your display, and turn Mermaid diagrams, the table of contents, and front matter display on or off. Changes apply to your next preview — no restart.
The app also opens Markdown files itself. Choose a file, or drag one onto the window, and read it full size with exactly the same rendering as the Quick Look preview.
Private by design
qlmd collects no data, requires no account, and sends nothing anywhere. Rendering happens locally inside the App Sandbox, and the preview is blocked from making any network connection at all. Read the full privacy policy.