Use Case Diagram Tool

The tool enables rapid construction of use case diagrams to capture actors, system boundary, and use cases. It supports relationships such as include and extend; it uses a lightweight domain model with validation and an automatic layout to render an accessible 512x512 SVG. It is suitable for software teams, business analysts, and product owners who need a concise, shareable view of requirements. The diagram language follows UML conventions, but the tool prioritizes clarity and speed over full modeling features.

Conceptually, users create actors and use cases, define a system boundary, and specify relationship types. The tool then applies a layout algorithm that places actors on the left, use cases on the right, and the boundary at center. Relationships are shown as edges with simple arrow conventions to indicate association, include, or extend. Exported SVGs preserve the diagram for documentation and can be reused in requirements artifacts.

Benefits include faster alignment among stakeholders, lightweight documentation for workshops, and a shareable diagram that captures scope without requiring a full modeling suite. The tool is especially useful in early design phases, API design discussions, and requirements validation sessions where visual clarity matters. It is free to use and does not require account creation for basic diagrams, enabling quick iterations.

Core features include actor and use case creation, system boundary labeling, relationship management, automatic layout, and 512x512 SVG export. The tool intentionally avoids heavy UI elements or branding in the diagram itself to keep focus on the modeled relationships.