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PlantUML

plantuml/plantuml
Ready to use There is an official hosted version — open it and go. No install, no deployment.

Generate diagrams from textual description

UMLArchitecture diagram
PlantUML website screenshot

From the README

PlantUML is a component that allows you to create various UML diagrams through simple textual descriptions. From sequence diagrams to deployment diagrams and beyond, PlantUML provides an easy way to create visual representations of complex systems.

Stars
★ 13.3k
Language
Java
License
LGPL-3.0
Last updated
2026-09-22
Category
Whiteboards & diagrams
Section
General