Create complex sequence diagrams effortlessly with a step-by-step visual wizard. No coding required.
The PlantUML Sequence Diagram Generator is a wizard-driven, web-based tool that makes designing UML sequence diagrams effortless-without needing to write PlantUML syntax. Create, visualize, and export standards-compliant diagrams from a simple, form-based interface.
Create professional sequence diagrams for software design, documentation, or business process modeling-quickly and error-free. This tool advances efficiency and accessibility for individuals and teams of any technical background.
From diagram title to interactive sequence flows, every step in this tool is guided and visual. Create, edit, review, and export your sequence diagram in minutes.
Enter a descriptive name to provide context for your diagram.
Add participants (e.g., actors, databases), customize their display names, aliases, and stereotype types-all visually.
Add messages, notes, dividers, and logical fragments (alternatives, options, loops) to visually model system behavior. Drag-and-drop or use step controls for perfect ordering.
See your diagram and code preview side by side; toggle between PlantUML code and SVG output. Export your work as JSON or SVG for documentation or further editing.
Browse an integrated gallery for common scenarios and switch between dark/light mode to suit your workflow.
