MDViewer by Crocopliers - Open .md files from Finder. Edit in place. See Git diffs.

MDViewer opens .md files instantly from Finder — double-click or press Space for a QuickLook preview. Built with SwiftUI, not Electron: it launches in under a second and uses a fraction of the memory. Edit in place with a double-click, browse Git history with color-coded diffs, render Mermaid diagrams and KaTeX math, export clean PDFs, and search across everything with ⌘F. Full GitHub Flavored Markdown. Lite version is free, Pro is $9.99. macOS 13+, Intel and Apple Silicon.

Hey Product Hunt! 👋 I built MDViewer because I was frustrated with how macOS handles Markdown. TextEdit can't render it. VS Code is overkill for reading a README. And Electron-based viewers take forever to open and eat your RAM. MDViewer is a native SwiftUI app that does one thing well: open .md files instantly from Finder. Double-click or press Space for a full QuickLook preview — tables, code blocks, Mermaid diagrams, everything rendered. But it grew beyond just viewing: Edit in place — double-click any word, write, ⌘S to save Git history — browse commits and see color-coded diffs in the sidebar Mermaid diagrams — flowcharts, sequence diagrams, ER diagrams as interactive SVGs KaTeX math — for technical and academic docs PDF export — smart pagination that doesn't break tables or code blocks JSON viewer — collapsible tree with pretty-print The Lite version is free and handles everyday reading. Pro ($9.99 one-time) unlocks editing, Git history, PDF export, and multi-file tabs. I'd love to hear how you use Markdown and what you'd want to see next. Happy to answer any questions!

MDViewer by Crocopliers - Open .md files from Finder. Edit in place. See Git diffs.

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