PlantUML Activity Diagram Editor - Create Professional Activity Diagrams Online
Design comprehensive activity diagrams with our free PlantUML editor. AI-powered generation, real-time preview, and instant export to PNG, SVG, PDF. Perfect for workflow modeling and process design.
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💡 Pro tip: Use 'fork' and 'end fork' to show parallel activities
Powerful Activity Diagram Features
Everything you need to create professional activity diagrams for workflow modeling and process design.
Start & End Points
Define clear start and end points for your activities with initial and final nodes.
Activity Actions
Create and organize activity actions that represent specific tasks or operations in your workflow.
Decision Points
Model decision points and conditional flows with diamond-shaped decision nodes.
Parallel Processing
Show concurrent activities and synchronization points with fork and join nodes.
Swimlanes
Organize activities by responsibility using swimlanes to show who performs each action.
Workflow Optimization
Analyze and optimize your workflows with clear visual representation of process flows.
Activity Diagram FAQ
Common questions about creating activity diagrams with PlantUML
What is an activity diagram?
An activity diagram is a UML diagram that shows the flow of activities and actions in a system or process. It's used for workflow modeling, business process analysis, and system behavior documentation.
How do I define start and end points in PlantUML activity diagrams?
Use 'start' and 'stop' keywords to define the beginning and end of your activity flow. You can also use 'end' for alternative ending points.
How do I create decision points and branches?
Use 'if', 'then', 'else', and 'endif' keywords to create decision points. You can also use 'switch' and 'case' for multiple branch decisions.
How do I show parallel activities?
Use 'fork' and 'fork again' to split into parallel flows, and 'end fork' to synchronize them back together. This shows concurrent execution paths.
How do I create swimlanes for different actors?
Use '|Actor Name|' syntax to define swimlanes. Place activities under the appropriate swimlane to show responsibility and ownership.
Is this activity diagram editor free?
Yes! Our basic activity diagram editor is completely free. You can create, edit, and export activity diagrams without any cost. Premium features include advanced AI assistance and collaboration tools.
Ready to Create Your Activity Diagram?
Start designing professional activity diagrams with our free PlantUML editor. No registration required.