Compare software

Hongdown vs mdformat: catalog facts
Hongdown	mdformat
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the MIT license.
Windows, Command line	Command line
Consistent, documented Markdown style applied automatically Per-project configuration file	Formats Markdown files in place or through standard input and output Supports plugins for Markdown extensions and code blocks
Enforces one author's conventions, which may not match your preferences Command-line only, with no editor interface of its own	Uses CommonMark rules by default, so other Markdown syntax may need plugins
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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