Markdown Lens
Preview & Export, Perfected
Only for Mac
Free · In‑App Purchases
Mac
NEW in 2.0: Microsoft Word export and Document Health with spell check, linting, and compatibility analysis. Math, diagrams, and 190+ language highlighting built in.
Markdown Lens is a fast, native Markdown viewer for macOS. Simply double-click any .md file to see it beautifully rendered with full GitHub Flavored Markdown support.
EXPORT WITH PRECISION
• Export to Microsoft Word (.docx) with full formatting, images, and diagrams
• Export to PDF with customizable paper size and margins
• Export to self-contained HTML with embedded images
• Print directly with accurate formatting
DOCUMENT HEALTH / PUBLICATION READINESS CHECK
• Real-time spell check powered by Harper with a technical jargon dictionary
• Structural linting with one-click auto-fix for common Markdown issues
• Platform compatibility analysis for GitHub, BitBucket, and more
• At-a-glance health score (0–100) with click-to-navigate issue details
POWERFUL RENDERING
• GitHub Flavored Markdown with tables, task lists, and strikethrough
• Math equations with KaTeX ($inline$ and $$block$$ syntax)
• Diagrams with Mermaid (flowcharts, sequence diagrams, and more)
• Syntax highlighting for 190+ programming languages
• Footnotes with clickable references
• GFM Alerts — Note, Tip, Important, Warning, and Caution callouts
DESIGNED FOR YOUR WORKFLOW
• Opens instantly from Finder—just double-click any .md file
• Live reload automatically refreshes when you edit in any external editor
• Click links to other Markdown files to open them in new windows
• Light and dark mode support follows your system appearance
PRIVACY FOCUSED
• All processing happens locally on your Mac
• No analytics, no tracking, no network connections required
• Your documents stay on your device
Markdown Lens is free to use with all features included. An optional one-time purchase removes periodic reminder messages and supports continued development.
Perfect for developers, writers, students, and anyone who works with Markdown files.
Ratings & Reviews
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VERSION 2.0 — MAJOR UPDATE
MICROSOFT WORD EXPORT
Export your Markdown files to native .docx documents. Tables, images, code blocks, math equations, Mermaid diagrams, footnotes, and formatting all translate beautifully into Word.
DOCUMENT HEALTH
A new sidebar analyzes your Markdown in real time:
• Spell check powered by Harper with a built-in technical jargon dictionary
• Structural linting catches common Markdown issues with one-click fixes
• Platform compatibility detects features that may not render on GitHub, BitBucket, and other platforms
• Health score gives you an at-a-glance 0–100 quality rating
GFM ALERTS
GitHub-style callout blocks — Note, Tip, Important, Warning, and Caution — render with proper styling in preview, PDF, HTML, and DOCX exports.
ADDITIONAL IMPROVEMENTS
• Scroll position preserved across reloads
• Improved PDF line spacing for ASCII art and code blocks
• Numerous refinements and bug fixes
The developer, John Decker, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- John Decker
- Size
- 18.6 MB
- Category
- Utilities
- Compatibility
Requires macOS 11.0 or later.
- Mac
Requires macOS 11.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Support Development $1.99
- Copyright
- © 2025-2026 John Decker