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Shiba vs MacMD Viewer: catalog facts
Shiba	MacMD Viewer
Free Free and open source under the MIT licence.	Paid One-time purchase of $19.99 with a 14-day money-back guarantee.
Windows	macOS
Keyboard-centric navigation Live Markdown preview alongside any editor	Quick Look previews of Markdown in Finder Renders Mermaid diagrams and tables
Version 2 is still a work in progress No tagged releases on GitHub	A viewer only, not an editor Requires macOS 14 or later
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.