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.

Open .md files from Finder. Edit in place. See Git diffs.