PlantUML Editor

Online PlantUML editor with real-time UML diagram preview.

Preview after entering PlantUML code

Alice -> Bob: Request
Bob --> Alice: Response
Alice -> Alice: Self Call

class Animal {
  +name: string
  +speak(): void
}
class Dog extends Animal

start
:Initialize;
if (Condition?) then
  :Operation A;
else
  :Operation B;
endif
stop

This tool provides online PlantUML editing with real-time preview, supporting sequence, class, activity, component, state, and use case diagrams.

Write PlantUML code in the left input, click buttons at the top to switch diagram types, and preview the rendered result on the right.