MDViewer
MDViewer is a native macOS app for opening, reading, editing, and exporting Markdown files with live preview, diagrams, and math support.
What is MDViewer?
MDViewer is a native Markdown viewer and editor for macOS that helps people read, review, and work with Markdown documents without opening them in a browser. It is designed for developers, writers, students, and other users who regularly open .md files and want a focused desktop reading experience. The app supports GitHub Flavored Markdown rendering, a table of contents sidebar, syntax-highlighted code blocks, LaTeX math with KaTeX, and Mermaid diagrams. It also includes a split-view editor with live preview, so you can edit text and see the rendered result at the same time. Common workflows include reviewing README files, documentation, notes, and AI-generated Markdown output, then printing or exporting the result as PDF. MDViewer runs as a native Mac app and is distributed as free and open source software by Ff2248.
Key features
- Open and render Markdown files instantly
- Edit Markdown in a split view with live preview
- Navigate long documents with an auto-generated table of contents
- View syntax-highlighted code blocks in supported languages
- Render LaTeX math expressions directly in documents
- Display Mermaid diagrams inside Markdown files
- Open local Markdown links and external links appropriately
- Print or export rendered documents to PDF
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
MDViewer is a normal document-viewing and editing app for Markdown files. It needs access to the files and folders you open so it can read linked images, follow local document links, and save edits or exports. External links in documents may open in your browser, which is expected behavior for this kind of app. If you use it for sensitive notes or project files, open only documents you trust and review links before clicking them.
Recommendation: Keep MDViewer if you use Markdown files regularly and want a dedicated Mac app for reading or editing them. If you no longer open Markdown documents with it, you can remove it like other user-installed apps without affecting macOS itself.
Common paths
/Applications/MDViewer.app~/Applications/MDViewer.app
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