Class Diagram Maker

How it works

Describe your system

Name the key classes, their attributes and methods, and how they relate — inheritance, composition, association. Plain language or code-style descriptions both work.

AI builds the diagram

MyMap generates a UML class diagram with properly formatted class boxes, relationship arrows, and cardinality labels.

Edit and document

Add new classes, adjust relationships, or ask AI to add interface abstractions. Export as PNG or PDF for architecture docs and code reviews.

Built different

AI that doesn't just chat — it sees, creates, and streams on your canvas.

Context-aware AI

AI that sees your whole canvas

AI understands node positions, connections, and neighbors — not just raw text. Select a node and it knows what's nearby, what's linked, and how to build on it.

Qwen 3 (235B)

Gemini 3 Flash

GPT-5 mini

Claude Sonnet 4.6

DeepSeek R1

Kimi K2.5

DeepSeek V3.2

Multi-model

Your AI. Your model.

10 models, 7 providers. Switch between Qwen, GPT, Claude, Gemini, and DeepSeek — no lock-in, ever.

Mind maps

Flowcharts

Diagrams

Slides

Visual formats

Every format, one chat

Mind maps, flowcharts, diagrams, slides — all from a single conversation. No tool switching.

✨

“a futuristic cityscape, neon lights, golden hour”

Klein 4BFluxSchnell+2

AI images

Images, right on canvas

Generate images directly onto your canvas. 5 Flux models, any aspect ratio, placed instantly.

Real-time

Watch it think

Nodes stream in as AI generates. Edges draw live. No waiting — watch ideas take shape in real time.

Frequently asked questions

Is the class diagram maker free?

Yes — free to use without signing up. Free accounts include a generous number of AI messages per month. Upgrade to Pro for unlimited diagrams.

Does this follow UML class diagram standards?

Yes. The output uses standard UML notation — class boxes with name/attributes/methods sections, solid arrows for inheritance, dashed arrows for dependencies, diamonds for composition and aggregation.

Can I use this for database design too?

For database schema design with tables, foreign keys, and constraints, the ER diagram maker is a better fit. Class diagrams are designed for object-oriented software modeling.