What is MDViewer used for?

MDViewer is a Mac-native Markdown reader with in-place editing, Git history, Mermaid diagrams and Finder Quick Look previews, built on SwiftUI. It is a good fit for reading project documentation on a Mac, previewing Markdown and Mermaid files from Finder, and exporting notes and specs as PDF.

Yes. MDViewer has a free plan, and paid plans start at $9.99 as a one-time payment.

Is MDViewer open source?

No. MDViewer is proprietary (closed-source) software. In the Developer Tools category, open-source options include GitHub Desktop, iTerm2 and Atlas.

What are some alternatives to MDViewer?

MDViewer competes with Typora, iA Writer and Bear.

MDViewer: features, pricing and alternatives

About MDViewer

MDViewer is a Markdown viewer and reader for the Mac, distributed through the Mac App Store. It is built natively with SwiftUI rather than Electron, and it opens .md files from Finder with full GitHub Flavored Markdown rendering, including tables, task lists, code blocks and strikethrough.

A Quick Look extension installs with the app, so pressing Space on a .md, .json or .mermaid file in Finder shows it rendered without launching anything. Mermaid flowcharts, sequence diagrams, ER diagrams and Gantt charts render as interactive SVGs, with a full-screen view that supports zoom and pan and follows light and dark mode. Fenced code blocks get highlighting for more than 180 languages.

Beyond reading, you can edit in place and browse Git history without leaving the app. JSON files open as a collapsible tree with a one-click format button, and any document can be saved as a PDF with a keyboard shortcut, with tables, code blocks and diagrams kept intact across page breaks and a choice of portrait or landscape.

Key features

Finder Quick Look previews for .md, .json and .mermaid
Interactive Mermaid diagrams with zoom and pan
Inline editing of Markdown documents
Git history browsing inside the app
PDF export with portrait or landscape pages
JSON tree viewer with a format button
Code highlighting for 180+ languages

Good fit for

Reading project documentation on a Mac
Previewing Markdown and Mermaid files from Finder
Exporting notes and specs as PDF

Tags: markdown; macos; markdown-viewer; mermaid; quick-look; swiftui; git

MDViewer: questions and answers

What is MDViewer used for?: MDViewer is a Mac-native Markdown reader with in-place editing, Git history, Mermaid diagrams and Finder Quick Look previews, built on SwiftUI. It is a good fit for reading project documentation on a Mac, previewing Markdown and Mermaid files from Finder, and exporting notes and specs as PDF.
Is MDViewer free?: Yes. MDViewer has a free plan, and paid plans start at $9.99 as a one-time payment.
Is MDViewer open source?: No. MDViewer is proprietary (closed-source) software. In the Developer Tools category, open-source options include GitHub Desktop, iTerm2 and Atlas.
What are some alternatives to MDViewer?: MDViewer competes with Typora, iA Writer and Bear.