Open Source Swift Markdown Editors

MarkEdit is a free and open-source Markdown editor, for macOS. It's just like TextEdit on Mac but dedicated to Markdown.

MiaoYan is a lightweight, native Markdown note-taking app for macOS, built to give programmers and writers a fast, distraction-free environment for text. It is fully local-first, meaning your notes live as plain Markdown files on your machine rather than in a proprietary cloud, which appeals to privacy-conscious users. The app focuses on a minimalist three-column layout (folders, note list, editor) with syntax highlighting, dark mode, and typography tuned for Chinese and English writing. Beyond basic editing, MiaoYan supports presentation and PPT-style modes, letting you turn Markdown documents into slide-like views directly inside the app. It also adds power-user features like automatic document typesetting, internal links, LaTeX math, Mermaid and PlantUML diagrams, and Markmap mind-map rendering. Under the hood, it is implemented in Swift as a native macOS application, which keeps it snappy and lighter than Electron-based note apps.

A simple Markdown editor. Notepad gives your users the ability to write and edit Markdown directly in your app. With a JSON stylesheet, it's fully themeable. Add it to your app with only a few lines of code`. Notepad is fully hackable and open-source.

Pine is a lightweight macOS markdown editor. It's currently a work in progress. It is a document-based application and aims to follow Apple's Human Interface Guidelines. Pine supports multiple folders and files in its sidebar. Individual files can also be opened in tabs and in separate windows. Touch Bar shortcuts are supported on compatible Macs. A Toolbar can be enabled in preferences. Markdown shortcuts are also available as keyboard combinations.

iOS Text View (UIView) that Properly Displays LaTeX, HTML, Markdown, and YouTube/Vimeo links. In order for the RichTextView to handle the various use cases it might encounter, the input string needs to be formatted.