PlantUML Use Case Diagram Editor - Create Professional Use Case Diagrams Online
Design comprehensive use case diagrams with our free PlantUML editor. AI-powered generation, real-time preview, and instant export to PNG, SVG, PDF. Perfect for requirement analysis and system design.
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💡 Pro tip: Use 'rectangle' to define system boundaries and keep actors outside
Powerful Use Case Diagram Features
Everything you need to create professional use case diagrams for requirement analysis and system design.
Actor Management
Define and manage actors (users, systems, or external entities) that interact with your system.
Use Case Definition
Create and organize use cases that represent specific functionalities or goals within your system.
Relationship Modeling
Model include, extend, and generalization relationships between use cases and actors.
System Boundary
Define clear system boundaries to distinguish between internal and external components.
Documentation Integration
Generate comprehensive documentation from your use case diagrams for stakeholder communication.
Requirements Traceability
Link use cases to specific requirements for better project management and validation.
Use Case Diagram FAQ
Common questions about creating use case diagrams with PlantUML
What is a use case diagram?
A use case diagram is a UML diagram that shows the interactions between actors (users or external systems) and use cases (system functionalities). It's used for requirement analysis and system design.
How do I define actors in PlantUML use case diagrams?
Use the 'actor' keyword followed by the actor name. For example: 'actor User' or 'actor :Customer:'. You can also use stick figures or other symbols.
What are include and extend relationships?
Include relationships show that one use case always includes another (mandatory). Extend relationships show optional behavior that may be added to a base use case under certain conditions.
How do I show system boundaries?
Use 'rectangle' or 'package' to define system boundaries. Place use cases inside the boundary and actors outside to show what's part of your system.
Can I use stereotypes in use case diagrams?
Yes, PlantUML supports stereotypes like <<include>>, <<extend>>, and custom stereotypes. Use them to add semantic meaning to your diagram elements.
What are best practices for use case diagrams?
Keep diagrams simple and focused, use clear and concise use case names, group related use cases, show only essential relationships, and validate with stakeholders.
Ready to Create Your Use Case Diagram?
Start designing professional use case diagrams with our free PlantUML editor. No registration required.