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MacDown 3000 vs StackEdit: catalog facts
MacDown 3000	StackEdit
Free Free and open source.	Free Free to use in the browser.
macOS	Web
Side-by-side live preview GitHub Flavored Markdown support	Live preview with synchronised scrolling Sync with Google Drive, Dropbox and GitHub
macOS only A focused editor without note organisation or sync	Browser only, no desktop app Cloud sync depends on third-party accounts
Downloadable app	Web application
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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