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Hongdown vs Prettier: catalog facts
Hongdown	Prettier
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source; an enterprise support offering is available.
Windows, Command line	Web, Command line
Consistent, documented Markdown style applied automatically Per-project configuration file	Consistent formatting with very little configuration Wide language support with community plugins
Enforces one author's conventions, which may not match your preferences Command-line only, with no editor interface of its own	Few options, so it may not match an existing house style Some languages depend on community plugins
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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