MyMapE-commerce system with products, orders, users, and payments...
01
Describe the domain
Name the main classes and give the attributes, operations, and relationship constraints you know.
Class Diagram Maker
Describe your system's classes, attributes, methods, and relationships and AI builds a UML class diagram — inheritance, associations, and interfaces, all structured correctly.
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Free AI Class Diagram Maker
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Templates made with this tool
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Prompts to start from
Click one to fill the box above. Edit anything before you send.
How to draft a class model
No template to fill in and no drawing. You talk; the canvas keeps up.
02
Build the structural view
MyMap organizes class details and links into a diagram for review.
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03
Refine the relationships
Ask to change multiplicities, split a class, or replace an inappropriate inheritance relationship.
What does a class diagram capture?
A class diagram describes the static structure of an object-oriented model. It shows what each class knows or does and how class instances can relate to one another.
Use it before responsibilities become code
Sketch a domain during design discussions, compare alternative models, or explain an existing system. Use a sequence diagram when the question is how objects interact over time.
Make the model precise
- Model domain concepts. Choose meaningful classes before listing implementation helpers.
- Keep responsibilities coherent. A class should have a clear reason to own its attributes and operations.
- State multiplicity. Distinguish one, optional, and many where the relationship requires it.
- Use inheritance deliberately. A subtype should make sense wherever its parent type is expected.
- Match the notation to the claim. Composition implies stronger ownership than an ordinary association.
A starting point for architecture review
MyMap turns your domain description into a visual class model that you can revise by asking. The e-commerce example contains User, Cart, Order, Product, and Payment with attributes, operations, and labeled associations; its design choices are illustrative.
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Ask for slides from this map and present frame by frame.
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Keep editing
Every map stays on your canvas; come back and ask for more.
Common questions
Is a class diagram the same as a database schema?
No. A class model can include behavior and inheritance, while a database schema describes persistence structures and constraints. The two may need different designs.
Will this generate implementation code?
The output described here is a diagram. Use it to review the model before implementing classes in your chosen language.
What if I only know the business concepts?
List the concepts and a few concrete examples of how they relate. Ask for a minimal model and label uncertain constraints for later review.
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Class Diagram Maker
Free to start. No credit card required.
✦ Free to start · No credit card required · PDF, docs & images supported