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MacMD Viewer vs Tinta: catalog facts
MacMD Viewer	Tinta
Paid One-time purchase of $19.99 with a 14-day money-back guarantee.	Free Free and open source under the MIT licence.
macOS	Windows
Quick Look previews of Markdown in Finder Renders Mermaid diagrams and tables	Single 2.5 MB executable with no runtime or Electron Native rendering of 22 Mermaid diagram families
A viewer only, not an editor Requires macOS 14 or later	Windows only Primarily a viewer, with lighter editing than a full Markdown editor
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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