Support

Last updated: July 6, 2026

Need help with Markdown Preview? We’re happy to assist. The app is read‑only, works fully offline, and has no accounts — so most questions are quick to answer.

Common questions

How do I open a Markdown file?

Double‑click a .md file in Finder, drag it onto the app icon, choose File → Open… (⌘O) inside the app, or right‑click a file and choose Open With → Markdown Preview.

Which file types are supported?

.md, .markdown, .mdown, and .mkd.

Can I edit documents?

No. Markdown Preview is deliberately a viewer only — there is no edit mode and no save command. Edit your files in your preferred editor and reload (⌘R) to see changes.

Why doesn’t a local image load?

Under the macOS App Sandbox, images next to a document may not load unless you opened that file through the app’s file picker. The app shows a placeholder when an image can’t be reached.

How do I change the theme or text size?

Click the gear icon in the toolbar to open settings, or press ⌘, for the Settings window. Use ⌘+ and ⌘− to adjust text size, and ⌘⇧T to toggle light/dark appearance.

Does the app collect any data?

No. Markdown Preview collects no data and makes no network requests. See our privacy policy for details.

System requirements

• macOS 14.0 or newer
• Apple Silicon or Intel Mac
• No internet connection required

Reporting a bug

When you email us, please include your macOS version, the app version (shown in Markdown Preview → About Markdown Preview), and steps to reproduce the issue. Screenshots are always welcome.