Technical Markdown
Diagrams, maths, and code. Rendered offline.
Imark is a Markdown viewer for Mac with Mermaid diagrams, KaTeX maths, code highlighting, GitHub-flavored tables, and task lists. The renderer is bundled with the app, so technical documents remain readable without a connection.
macOS 14+ · 5.8 MB
Updated
One viewer for technical documents
Architecture notes, specifications, READMEs, research notes, and agent plans often mix prose with structured technical content.
Mermaid diagrams
Render flowcharts, sequence diagrams, state diagrams, and other Mermaid blocks inline.
KaTeX maths
Read inline and display equations without sending the document to an online renderer.
Highlighted code
Keep fenced code blocks legible alongside tables, tasks, links, and images.
Works with the editor you already use
Write the Markdown in Cursor, VS Code, Zed, Vim, or another editor. Imark watches the file, updates after each save, and keeps the reading position stable so the rendered document can stay beside your editor.
The same renderer in the app and Finder
Technical content appears consistently in the Imark window and its Quick Look extension. You can inspect a diagram from Finder, then open the full document when you need the outline, tabs, search, comments, or PDF output.
Private by design
Documents render on the Mac. Imark blocks remote requests from document content and does not require an account, which makes it suitable for private specifications and local repositories.
Questions
What people want to know.
Does Mermaid work offline in Imark?
Yes. Mermaid is bundled with the app and diagrams render without an internet connection.
Which maths syntax does Imark use?
Imark uses KaTeX to render common inline and display maths written in Markdown documents.
Can Imark export technical Markdown to PDF?
Yes. You can print a rendered document to PDF, including visible Imark comments when you want them in the output.
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Download Imark for a focused Markdown viewer built for Mac, Finder, and local files.
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