Live preview
Write and preview, side by side.
Write on the left, see the rendered result on the right. The preview updates as you type and scrolls with your cursor, so you keep your place in long documents.
Markdown · for macOS
A calm, native home
for your Markdown.
A Markdown editor for the Mac, with a live preview that keeps up as you write.
Version 1.1 — now with in-app update checks.
A true native Mac app — built in SwiftUI
Universal — tuned for Apple silicon
Actively developed and supported
Code & math
Real syntax highlighting and math.
Fenced code blocks get proper syntax highlighting, and LaTeX math is typeset with KaTeX. It's all rendered on your Mac from assets bundled in the app, so nothing is fetched from the internet.
Diagrams
Diagrams from plain text.
Describe a flowchart or sequence in Mermaid syntax and Glassmark renders it inline. The diagram stays in your document as text, so it's easy to version and share.
More
Built for everyday writing.
Export to PDF & HTML
Share a polished document in a couple of clicks — clean HTML or print-ready PDF.
Focus & typewriter modes
Dim everything but the line you're writing, and keep it centred as you type.
Themes & custom CSS
System, Sepia, High Contrast and Dark preview themes — or bring your own CSS.
Folder workspaces
Open a folder and browse, search and edit a whole project from the sidebar.
Quick Open & outline
Jump to any file with ⌘P and navigate long documents from a live outline.
Fast & dependency-free
Built in Swift with zero third-party code. It launches instantly and stays out of the way.
Get Glassmark.
Free to download, and native to macOS.
Support
Help from the people
who built it.
Questions, bugs or ideas? Email us and you'll hear back from a real person, usually within a day.