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MacDown 3000 vs Markdown Monster: catalog facts
MacDown 3000	Markdown Monster
Free Free and open source.	Paid Commercial software with a free trial available.
macOS	Windows
Side-by-side live preview GitHub Flavored Markdown support	Synced live preview that follows the cursor and scroll position Two-way table editor and image paste from the clipboard
macOS only A focused editor without note organisation or sync	Windows only Paid licence after the trial
Downloadable app	Downloadable app
Open source	Closed source
License not stated	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 1, 2026	Official website Full listing and sources Checked October 1, 2026

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