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Mermaid vs mmdr: catalog facts
Mermaid	mmdr
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Web, Command line	Windows, Command line
Diagrams are plain text, so they diff and review like code Rendered natively by GitHub, GitLab and most documentation generators	No browser or Node.js dependency Much faster than mermaid-cli
Layout is automatic, so fine control over positioning is limited Complex diagrams become hard to read in source form	Under active development, so output may differ from official Mermaid No packaged GitHub releases
Web application, Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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