MDViewer — Fast, Native Markdown Viewer for macOS

MDViewer is a lightweight, beautifully designed Markdown viewer built with SwiftUI. Open any .md file and see it instantly rendered — with syntax highlighting, diagrams, and math support.

Key Features Beautiful Markdown Rendering - Full GitHub Flavored Markdown (GFM) support — tables, task lists, code blocks, links, images, and more.

Syntax Highlighting - 180+ languages with a GitHub-style theme. Automatically adapts to light and dark mode.

Table of Contents - Auto-generated from headings with smooth scroll sync and collapsible sections.

Mermaid Diagrams - Render flowcharts, sequence diagrams, ER diagrams, Gantt charts, and more — with fullscreen zoom.

Math Formulas - LaTeX-powered rendering via KaTeX — supports inline and block equations, matrices, integrals, and symbols.

JSON Viewer - Open .json files as an interactive, collapsible tree with formatting tools.

Find in Document - Instant search with highlighting and quick navigation (Cmd+F).

QuickLook Integration - Preview .md, .json, and .mermaid files directly in Finder with the Space bar.

Work with Projects - Multi-Tab Interface

Open multiple files at once - Drag & drop files and folders.

File Tree Navigation - Browse your project from the sidebar and quickly open files.

Git History & Diffs - View commit history, switch versions, and compare changes with line-by-line diffs.

Inline Editor - Edit Markdown with syntax highlighting — jump to position and start typing instantly.

Designed for macOS - Native SwiftUI App. Fast, responsive, and memory-efficient.

Light & Dark Mode - Seamless adaptation to system appearance.

Keyboard Shortcuts - Powerful shortcuts like Cmd+F, Cmd+S, Cmd+R, and more.

Default Markdown App - Set MDViewer as your default .md viewer for instant access.

Status Bar - Word count, reading time, and zoom controls at a glance.

Export to PDF - with paginated pages and beautiful margins.