OpenFlowKit
Free, open-source, local-first diagramming tool for developers that turns code/schemas into diagrams and cinematic animations.
What it does
OpenFlowKit is a 100% free, MIT-licensed, local-first diagramming studio aimed at developers. You can draw by dragging nodes or generate diagrams from code (JSON, Prisma, SQL, TypeScript), then export to SVG, PNG, Figma or animated MP4. AI features run with your own OpenAI/Anthropic key.
Core features
Free and open-source (MIT), local-first storage
Import code/schemas into diagrams
Cinematic MP4 animation export
Diagram-as-code DSL and Mermaid support
Figma/SVG/PNG/JSON export
Bring-your-own-key AI assistant
Real-time multiplayer via WebRTC
Best for
→Document software architecture
→Generate diagrams from a schema or codebase
→Create animated system-design presentations
→Collaborate on diagrams in real time
Pricing
Free
Toolspool rankingby monthly traffic