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Graphviz vs Kroki: catalog facts
Graphviz	Kroki
Free Free and open source.	Free The public kroki.io service and interactive editor are free to use.
Windows, Command line	Web, Self-hosted
Diagrams generated automatically from plain text Exports to PNG, SVG, PDF and PostScript	One API for dozens of text-based diagram languages Live in-browser editor for trying each format
Requires learning the DOT language Limited manual control over automatic layouts	Aimed at developers and documentation tooling rather than freehand drawing Each diagram language has its own syntax to learn
Downloadable app	Web application, Self-hosted, Hosted service
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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