Compare software

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

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