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Astro Editor vs MarkEdit: catalog facts
Astro Editor	MarkEdit
Free Free downloads from the project's GitHub releases.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	macOS
Frontmatter shown as forms built from Zod schemas Focus and typewriter modes for prose	About 4 MB installed and fast on very large files Strict GFM support with no invented syntax
Only useful for Astro content collections Linux build is in beta	macOS only Focused on Markdown rather than general note organisation
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account 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 1, 2026

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