Free Class Diagram Generator Online
Free Class Diagram Generator Online
Design object-oriented structures with classes, interfaces, inheritance, and associations.
What is a Class Diagram?
A class diagram is a UML diagram that shows the structure of a system by depicting classes, their attributes, methods, and the relationships between them. It's a fundamental tool for object-oriented design, helping developers plan code architecture before implementation.
Common Use Cases
- •Software design - Plan class hierarchies and relationships
- •Database modeling - Map entities to object models
- •API design - Define data transfer objects and services
- •Documentation - Communicate system architecture to teams
- •Code generation - Use diagrams as blueprints for implementation
Syntax Quick Reference
| Element | Syntax | Description |
|---|---|---|
| Class | class Name { } | Define a class |
| Attribute | +String name | Class property (+ public, - private) |
| Method | +method() | Class function |
| Inheritance | <|-- | Extends relationship |
| Composition | *-- | Contains relationship |
| Association | --> | Uses relationship |
Export Options
PNG Export
High-resolution images for documents and presentations.
SVG Export
Scalable vectors for web and further editing.
PDF Export
Print-ready format for professional documentation.
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