Hi, I'm Arthur.

Builder. Based in Paris. I make MacMD Viewer, a native Mac reader for the Markdown files AI agents keep sending you.

About me

I'm a builder. I make tools. My background is product and growth. I spent the last few years at early-stage startups helping them go from zero to their first thousands of users.

I run a company on the side, but my main focus right now is automation. Building systems that take the repetitive work out of people's days.

MacMD Viewer is one of those tools. I started it about six months ago because I spend most of my days reading what AI agents produce, and macOS still shows .md files as raw text. This is the reader I wanted for myself.

Why MacMD Viewer

I work with AI all day. Claude, ChatGPT, Cursor, Copilot: every one of them writes Markdown. Whole days of mine are spent reading what these agents produce. Specs, plans, research, meeting notes, architecture decisions. macOS shows all of it as raw text.

I wanted a tool that opens any .md file the way it was meant to be read. Rendered headings, Mermaid diagrams, syntax highlighting, QuickLook in the Finder. Nothing else. No editor pane, no account, no subscription.

Reading your AI's output properly is not a nice-to-have. It is how you catch the thing that's wrong before you ship it.

How it's built

Swift 6, SwiftUI, WKWebView. Native. Read-only by design; the app never modifies your files. Two megabytes on disk, around 30 MB of RAM, launches under half a second on Apple Silicon.

One-time purchase, $19.99. No subscription, no trial, no account. 14-day money-back guarantee. Free updates.

Contact

If you have a bug, a feature request, or you want to write about MacMD Viewer, the fastest way to reach me is email or X.

Try MacMD Viewer

Native Mac Markdown reader. $19.99 one-time.

Get MacMD Viewer