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Design & ValidateToolOpen sourceFree
PlantUML
An open diagram generator supporting the UML family, sequences, activities, states, components, deployments, mind maps, and other diagram types.
Visit official siteContent record updated Aug 1, 2026Official site reached automatically · Checked Aug 3, 2026
Why it’s here
It keeps client, service, save, and tooling contracts inside technical-design docs and can rebuild them in CI to limit drift.
Best fit
Prototype systems, stories, and interactions, then validate them with real players.
technical-designarchitecture
Before you commit
The broad syntax and theme tuning take time; public render servers can expose diagram contents, so sensitive projects should render locally.
