Kroki Review
Kroki provides a unified API and free hosted service to render diagrams from text descriptions across 20+ libraries including PlantUML, Mermaid, and GraphViz.
Verdict
Kroki eliminates the hassle of installing disparate diagram toolchains by exposing a single HTTP endpoint that accepts text and returns rendered SVG, PNG, or PDF for over 20 diagram types. It's particularly useful for documentation pipelines and CI/CD workflows where deterministic diagram rendering is needed without runtime dependencies. Being free and open-source with a hosted option lowers the barrier to entry, though self-hosting is straightforward for teams with data sensitivity concerns.
Best for
Kroki is best for developers and users who need to create diagrams from textual descriptions, especially those who work with multiple diagram libraries.
At a glance
Pros & cons
- Single API for 20+ diagram libraries
- Free hosted service
- Self-hostable for privacy
- No AI-assisted diagram generation
- Limited to text-defined diagram types
Related tools
Frequently asked
- Is Kroki free to use?
- Yes. Kroki has a free plan — Free hosted service; self-hostable open-source
- Does Kroki have memory?
- No persistent memory — sessions don't carry over by default.
- Can Kroki do voice or images?
- Voice: no. Image generation: no.
- What are the best alternatives to Kroki?
- Browse the AI Tools Directory for related tools.
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