UML Class Diagram Maker
Describe your system — "hospital management with doctors, patients and appointments" — and get a UML class diagram with attributes, methods and the right relationships, ready for your report or design review.
- Classes, abstract classes, interfaces and enums
- Attributes and methods with visibility (+ - #)
- Inheritance, realization, composition, aggregation, association, dependency
- Multiplicities at both ends
- Parents laid out above subclasses automatically
How it works
- Describe the system
- The AI picks the classes and relationships
- Edit members by double-clicking
- Export to PNG, PDF or PowerPoint
Try it with
- Library management system
- Online shopping with orders and payments
- Hospital management system
- Shapes: Circle, Rectangle, Square (OOP)
Frequently asked questions
Is it free?
Yes. Drawing by hand is always free and every account includes free AI credits. AI Flowchart Pro adds unlimited AI generation and every diagram type.
Does it use real UML notation?
Yes: hollow triangles for inheritance, dashed triangles for realization, filled diamonds for composition, hollow diamonds for aggregation, and multiplicities like 1 and 0..*.
Can I export it?
Yes — PNG, SVG, PDF, PowerPoint with an editable slide, Mermaid code and draw.io. You can also share a live link or present it full screen.