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Letter Opener vs MDHero

Side-by-side comparison for macOS

Letter Opener

8.0
Developer Tools

Display winmail.dat files directly in Mail.app

MDHero

7.5
Developer Tools

Markdown viewer and editor

Metric Letter Opener MDHero
Category Developer Tools Developer Tools
AI Score 8.0 7.5
30-day Installs 1 233
90-day Installs 4 233
365-day Installs 76 233
Version 16.0.7 0.2.10
Auto-updates No No
Deprecated No No
GitHub Stars 3.8K 184
GitHub Forks 241 23
Open Issues 5 23
License MIT MIT
Language Ruby Svelte
Last GitHub Commit 2y ago 1mo ago
First Seen Nov 3, 2021 Sep 28, 2026

Reviews

Letter Opener

Letter Opener is a macOS app that simplifies viewing winmail.dat files directly in Mail.app, a common issue for users dealing with Outlook-generated emails. It offers developers a tool to preview emails in the browser, enhancing workflow efficiency.

Displays winmail.dat files within Mail.app, allowing users to view rich text and embedded content without extra software.

Pros

  • + Effectively handles winmail.dat files, a common issue
  • + Actively maintained with a robust community following
  • + Open-source MIT license, appealing to developers

Cons

  • - Low recent installs indicate limited awareness or adoption
  • - Manual updates required, no auto-update feature

MDHero

MDHero is a sleek, native Markdown viewer and editor for macOS, offering real-time preview and a lightweight design. Ideal for developers and writers who need a simple, efficient tool for creating and editing Markdown documents.

MDHero is a Markdown viewer and editor with real-time preview capabilities.

Pros

  • + Beautiful native design with a clean interface
  • + Real-time preview for seamless editing
  • + Lightweight and efficient with a small footprint

Cons

  • - No auto-update feature
  • - Limited community support and adoption