Syntax-highlighted editor
Real-time highlighting for headings, emphasis, code, links, tables, task lists, blockquotes, and more. Adjustable font size and optional line numbers.
Write with syntax highlighting. Preview live as you type. Insert any Markdown construct in one click. Export to HTML or PDF. Twenty-seven themes. Zero Electron.
# MasterMD The Master of all Markdown Apps **Write** with *syntax highlighting*. Preview [live](preview) as you type. ```mermaid graph LR A[Write] --> B[Preview] B --> C[Export] ```
The Master of all Markdown Apps
Write with syntax highlighting. Preview live as you type.
Built for programmers, writers, and anyone who lives in .md files — without the bloat of a web wrapper.
Real-time highlighting for headings, emphasis, code, links, tables, task lists, blockquotes, and more. Adjustable font size and optional line numbers.
See rendered HTML instantly. Preview scrolls with your cursor so you always know exactly how the finished document looks.
Browse 40+ Markdown constructs across nine categories. Search, preview each snippet, and insert at your cursor with one click.
Context-aware completions while you type. Type # for headings, - for lists, or ``` for code and diagrams.
Flowcharts and sequence diagrams render live in preview, HTML export, and PDF. Theme-aware styling built in.
Editor only, preview only, or split view. Toggle the insert panel anytime. Each window holds its own independent document.
Lines, words, characters, and estimated reading time in the status bar. Know the scope of your document at a glance.
Sandboxed. Files stay on your Mac. Preferences stored locally. No cloud sync, no tracking, no account required.
MasterMD handles the Markdown you actually write — not a watered-down subset.
## Task List - [x] Ship the feature - [ ] Write the docs - [ ] Celebrate | Column | Align | |:-------|------:| | left | right | **bold** | *italic*
Fourteen programmer palettes and thirteen reading-focused themes — all applied consistently across editor, preview, and UI.
Export uses your active theme and embeds local assets so the output looks exactly right — even offline.
Self-contained HTML with embedded images and inlined Mermaid JavaScript. Open in any browser, share anywhere, no server required.
⌘⇧EProfessional PDF output via native WebKit rendering. Diagrams, tables, and code blocks included. Perfect for reports and documentation.
⌘⇧PMasterMD is a true native application — SwiftUI, AppKit, and WebKit. No Electron shell. No Chromium bundled. Just a fast, lightweight editor that feels at home on your Mac.
Real NSTextView editing with native scroll performance, undo/redo, and system integration.
Every common action is one keystroke away.
Download MasterMD and start writing with live preview, beautiful themes, and effortless export.