OpenFlowKit is a 100% free, open-source diagram engine designed for engineers, architects, and product teams. It allows users to create professional architecture diagrams and flowcharts using either a visual drag-and-drop interface or 'Diagram as Code' with Mermaid.js and a type-safe DSL. Powered by React Flow, it offers a local-first experience where data stays on the user's machine, requiring no signup or cloud synchronization. It also features an AI assistant called Flowpilot for chat-based diagram editing and a unique Figma export that provides editable vector shapes.
Free, open-source diagram engine with AI, Mermaid.js support, and Figma vector export.
- Software engineers defining system architectures through version-controlled code
- Product teams sketching user flows without needing to
- Users can begin immediately without an account. You can create diagrams by writing code (Mermaid.js/DSL) or by dragging elements onto the canvas. Use the 'Flowpilot AI' to make adjustments like adding nodes or changing styles via chat commands. Diagrams can be exported to SVG
- PNG
- or JSON
- or copied directly into Figma as editable layers. Developers can also clone the repository from GitHub to host it themselves or modify the engine.

Free AI diagram generator for visual collaboration, turning ideas into diagrams.


AI-powered online whiteboard for team collaboration and visual communication.


Automates publication-ready academic illustrations and scientific figures using multi-agent AI.


Collaborative workspace for diagrams, mind maps, and project planning with AI features.


AI tool generating accurate, classroom-ready scientific diagrams for STEM education and research.


AI-powered tool to turn ideas/text into clear diagrams & infographics.


AI-powered diagram editor for professional visuals and flowcharts.


AI-powered visual collaboration platform for teamwork and project management.


Infinite canvas for exploring and chaining large language model outputs.







