BlankKey

Markdown Quick Look for Mac

Press Space. Read Markdown.

Preview Markdown as a real document — with tables, math, Mermaid diagrams, highlighted code and more. Need to make a change? Open it in BlankKey and edit the Markdown.

Coming soon to the Mac App Store

Free · macOS

Quick Look window showing a rendered Markdown report: front matter as a table, headings, status badges, a quotation and a task list.

Select a Markdown file in Finder and press Space.

What it renders

CommonMark
GFM
Tables
Math
Mermaid
Code
Footnotes
Front Matter
HTML

When preview isn’t enough

Edit when needed.

Open the same Markdown file in BlankKey, make the change, and keep the rendered document beside the source.

The BlankKey window in dark appearance: Markdown source on the left, the rendered document on the right.

Quick Look

Select a Markdown file in Finder and press Space. The preview makes no network requests — everything it needs ships inside the app.

Rich rendering

GitHub Flavored Markdown, KaTeX math, Mermaid flowcharts, sequence and state diagrams, highlighted code, front matter and raw HTML.

Light & Dark

Documents follow the system appearance, in Quick Look and in the app window alike.

Editor included

Fix a line with the source beside the rendered page. Nothing is written to the file until you save.

Requires macOS 14 or later.