Badger Class Diagram

Create UML class diagrams online from simple text — no Visual Paradigm or Enterprise Architect needed. Define classes with attributes and methods, then specify relationships using standard UML notation. The diagram renders instantly. Export as PNG for presentations or SVG for documentation. Everything runs in your browser.

How do I create a class diagram?

Define classes with their attributes and methods using simple text. Then define relationships using arrows: <|-- for inheritance, *-- for composition, o-- for aggregation, --> for association. The diagram renders instantly.

What relationship types are supported?

Inheritance (<|--), composition (*--), aggregation (o--), association (-->), dependency (..>), and realization (..|>). Each renders with standard UML notation.

Can I show visibility modifiers?

Yes. Use + for public, - for private, # for protected, and ~ for package-private. These render as standard UML visibility symbols on the diagram.