Excalidraw

Virtual whiteboard for sketching hand-drawn like diagrams — collaborative and end-to-end encrypted.

Excalidraw is an open-source virtual whiteboard tool for creating hand-drawn style diagrams that look like sketches on a real whiteboard. Its simplicity makes it ideal for quickly visualizing ideas, creating architecture diagrams, wireframing UIs, or drawing flowcharts during team discussions. The tool supports real-time collaboration with end-to-end encryption, ensuring that collaborative whiteboarding sessions remain private. Excalidraw stores files locally in the browser by default and exports to PNG, SVG, and Excalidraw's own JSON format. With a growing library of community-contributed shapes, embeddable mode for integrating into other applications, and a minimalist, distraction-free interface, Excalidraw has become an essential tool for remote engineering teams communicating visually.