Excalidraw is an open-source web application for creating hand-drawn style diagrams and sketches on a virtual whiteboard. Developers can use it to quickly diagram system architecture, flowcharts, and technical designs, either standalone or by embedding it in their own applications. The project includes built-in support for real-time collaboration, making it useful for remote team communication and documentation.

3,246 open issues · last updated Jul 21, 2026