MarkSafe

A small, high-performance Markdown Viewer and Editor for Windows, macOS, and Linux. Designed for speed, simplicity, and a polished user experience.

MarkSafe is a quick, native tool for previewing and editing Markdown files. Whether you are a developer, a technical writer, or someone who just needs to read a README, MarkSafe provides a clean, distraction-free environment.

Key Features

• Cross-Platform: Consistent experience across Windows, macOS, and Linux.
• Multi-File Support: Work with multiple documents simultaneously using a clean tabbed interface.
• Real-time Rendering: See your changes instantly as you type.
• Comprehensive Markdown Support:
  • GFM: Tables and interactive tasklists.
  • GitHub-style Alerts: High-visibility notes, tips, and warnings.
  • Math: Support for KaTeX mathematical expressions.
  • Diagrams: Integrated Mermaid.js support for flowcharts and diagrams.
• Dual-Theming:
  • App Frame: Choose between Dark, Light, or Auto modes for the editor.
  • Preview: High-quality preview styles including Dark, Light, Sepia, and Monochrome.
• Focus Mode: Hide everything except the content for a true distraction-free experience.
• Print & Export: One-click "Print to PDF" or export to standalone HTML.
• Multilingual (i18n): Native support for English, German, Spanish, and French.

Secured by Default

MarkSafe is built with security in mind. By default, it operates in a restricted environment:

• Directory Whitelisting: The application only accesses files in directories you have explicitly allowed. Opening or saving a file automatically whitelists its location.
• External Resource Control: Every time a document tries to load images or content from a new external website, you will be prompted for permission.
• Safe Link Handling: Links to other Markdown files are intercepted and opened within the viewer after a security check.

Installation

The easiest way to get MarkSafe is to download the latest version from the Releases page.

Windows

1. Download marksafe-installer.exe.
2. Run the installer to set up MarkSafe on your system.

macOS

1. Download marksafe-mac.zip.
2. Extract the ZIP and move MarkSafe.app to your Applications folder.

Linux

1. Download the marksafe binary.
2. Grant execution permissions: chmod +x marksafe.
3. Run it directly or add it to your path.

📄 License

MIT License - Copyright (c) 2026 Michael Lechner

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For technical details, build instructions, and contribution guidelines, see DEVELOPER.md.