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.
Drawbacks
- 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.
Frequently asked questions
Kroki is free to use.
Yes, Kroki is open source under the MIT licence.
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.
Kroki is best suited for Freelancer, Graphic Designer, Product Designer.
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