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QLMarkdown vs Marked 3: catalog facts
QLMarkdown	Marked 3
Free The open-source software is available without a license fee. Hosting, hardware and…	Paid Paid app with a free trial, also available on the Mac App Store and Setapp.
macOS	macOS
Includes configurable previews and HTML conversion tools.	Live preview that works alongside any text editor Proofreading tools beyond a plain preview
It is a preview extension rather than a standalone editor.	Mac only, requires macOS 11 or newer Previews and exports rather than edits text
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License: Proprietary
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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