UML Diagram Maker

Draw UML the right way — class diagrams with inheritance, composition and multiplicities, use case diagrams with actors and «include»/«extend», state machines and activity diagrams with forks and joins. Describe your system and the AI drafts it in standard notation.

  • Class, use case, state, activity and sequence diagrams
  • Real UML arrows: inheritance ▷, realization, composition ◆, aggregation ◇
  • Multiplicities like 1 and 0..*
  • Templates: library, ATM, online shopping, hospital
  • Right-click any line to change the relationship

How it works

  1. Choose the UML diagram
  2. Describe the system or pick a template
  3. The AI drafts it in UML notation
  4. Fine-tune and export for your report

Try it with

  • Class diagram for a library management system
  • Use case diagram for an ATM
  • State diagram for an online order
  • Activity diagram for exam registration

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.

Which UML diagrams are supported?

Class, use case, state machine, activity and sequence diagrams, each with the standard shapes and arrows taught in software engineering courses.

Can it make all the diagrams for my project report?

Yes — the Project Kit generates DFDs, ER, use case, class, activity and sequence diagrams from your project title, with explanations and viva questions.

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.

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