PlantUML

PlantUML is a powerful diagramming engine that generates diagrams from a more expressive and feature-rich language. Unlike Mermaid, PlantUML produces SVG or PNG images at build time, and supports:

• UML diagrams (class, sequence, deployment, activity, etc.)
• Component and architecture diagrams
• Detailed state machines
• Wireframe diagrams
• Rich styling and skin parameters

PlantUML can run locally using Java and a .jar file, which is ideal for offline or secure environments.

High-Level Flowchart

Detailed Pipeline Flow

Sequence Diagram