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.

Ink is a fast and flexible Markdown parsing library written in Swift that is designed to convert Markdown content into structured representations suitable for rendering or further processing. Originally developed as part of the Publish ecosystem, it focuses on performance and extensibility while maintaining a relatively simple and understandable internal architecture. The parser operates by reading Markdown input through a structured reader system that processes fragments and determines how each section should be interpreted. It uses error handling as part of its control flow, allowing the parser to efficiently decide whether to advance or rewind when processing different Markdown constructs. Ink is intended to be both production-ready and developer-friendly, encouraging users to explore and extend its functionality as needed.

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.