MuM

MuM

A reading-first Markdown engine for macOS

92upvotes
Launched September 28, 2026

About MuM

MuM is a specialized Markdown reader designed specifically for macOS users who prioritize reading over writing. Unlike traditional Markdown editors that combine editing and preview functionalities, MuM focuses solely on providing a fast, native reading experience, leveraging AppKit for optimal performance without relying on web engines. It allows users to manage multiple Markdown projects across numerous folders, each remembering their last reading position, making it ideal for those dealing with extensive documentation or personal notes. Its cross-project search feature, combined with finely tuned typesetting for both CJK and Latin scripts, ensures a seamless and comfortable reading experience. With impressive performance metrics—such as a 0.3-second cold start, rapid scrolling at over 100 fps, and a lightweight download—it offers a highly responsive alternative for Mac users seeking a dedicated Markdown reader. As open-source software under the MIT license, MuM is accessible and customizable for those who value performance and simplicity in their reading workflows.

Screenshots

MuM screenshot 1
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Pros

  • ✓Native macOS application with optimized performance using AppKit
  • ✓Fast load times and smooth scrolling for large documents
  • ✓Supports multiple projects with individual reading positions
  • ✓Cross-project search functionality
  • ✓Typesetting tuned for CJK and Latin scripts

Cons

  • ✗Limited to reading; lacks editing or writing features
  • ✗No web engine reliance may restrict certain advanced functionalities
  • ✗Currently no information on pricing or premium features

Use Cases

1Reading and reviewing large Markdown documentation or eBooks
2Managing and browsing multiple Markdown project folders
3Studying or referencing technical notes with precise typesetting
4Cross-project research and quick navigation through Markdown files
5Personal knowledge management where reading is prioritized over editing

Pricing

Pricing not verified

Quick Info

Upvotes92
Comments4
Launched9/28/2026

Topics

Open SourceDeveloper ToolsGitHub

Makers

IceskYsl

IceskYsl

@iceskysl

Alternatives

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