A unified rendering service for over 20 diagram syntaxes — Mermaid, PlantUML, Graphviz and more — from one API and browser playground.
Why we recommend it
Teams that use several diagram-as-code tools end up juggling separate renderers for each syntax. Kroki puts them all behind one interface, so the syntax is the only thing that changes.
Strengths
- Free and open source under MIT. Supports 20+ diagram types through one interface, self-hostable, browser playground for quick one-off diagrams with no setup.
Keep in mind
- The browser playground is meant for trying syntax, not a full diagram-authoring UI — serious use benefits from self-hosting the API. Each diagram syntax still has its own learning curve; Kroki doesn't simplify the syntax itself.
How much does Kroki cost?
Free — Free.
List price, excluding tax. Compare prices across the directory.
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