Back to library
Design & ValidateToolOpen sourceFree
Excalidraw
An open-source, hand-drawn whiteboard for gameplay loops, state flows, level sketches, and technical diagrams.
Visit official siteContent record updated Jul 31, 2026Official site reached automatically · Checked Aug 3, 2026
Why it’s here
It communicates clearly without making early drafts look final, which suits asynchronous reviews and remote collaboration.
Best fit
Prototype systems, stories, and interactions, then validate them with real players.
game-designtechnical-design
Before you commit
Complex documentation, permissions, and durable team knowledge still need a broader platform.
