Class diagram maker
Map complex processes using our UML class diagram creator. Build professional, data-backed diagrams in minutes with Lucidchart.
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Professional, polished UML class diagram maker
Leverage dynamic UML class diagramming capabilities designed to streamline your processes and boost productivity.

Align your team on technical logic

Leverage UML shape libraries and symbols

Leverage Lucid AI

Collaborate in real time

Boost productivity with 100+ integrations
Lucidchart feature highlights
Real-time collaboration
Real-time collaboration
Data linking
Data linking
Conditional formatting
Conditional formatting
Layers
Layers
Revision history
Revision history
Shape libraries
Shape libraries
AI prompt flow
AI prompt flow








Lucidchart feature highlights
Streamline work by enabling multiple collaborators to create and edit the same diagram at once.
UML class diagram templates and examples
Choose a customizable template to create a UML class diagram online.
Getting started in Lucidchart
Getting Started in Lucidchart
Follow along with this video tutorial and learn how to make any type of diagram in Lucidchart.
Why teams choose Lucidchart
As an intelligent diagramming application, Lucidchart provides simple yet powerful capabilities for visualizing information.

Collaboration. Bring teams together side by side on a shared canvas from anywhere in the world.
Alignment. Build transparency and shared understanding of how a team or company works.
Large-scale change. Increase visibility, standardization, and knowledge sharing across your entire org.
End-to-end workflows. Upgrade to the Lucid Suite for a complete, connected visual collaboration solution.
What is a UML class diagram?
A UML (Unified Modeling Language) class diagram is essentially the blueprint of a software system. It’s a static structure diagram that describes a system's structure by showing its classes, their attributes, operations (or methods), and the relationships among objects. Think of it as a blueprint of your code before you actually write it.
Steps to drawing a UML class diagram
Identify the primary objects (classes)
Define attributes (data)
Determine operations (methods)
Establish relationships
Define composition vs. aggregation
Publish and share
Additional Lucidchart resources

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Lucidchart tutorials
Go to the Lucidchart tutorials playlist on YouTube for video training on various topics.

Collaborate with AI
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Lucid blog
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Lucidchart pricing
Create a free account and compare options for paid Individual, Team, or Enterprise plans.
Frequently asked questions about UML diagrams
Can I build a UML diagram using markup?
How can I change the formatting of a UML diagram?
Can I show the difference between current and future states within the UML diagram?
What are the options for sharing my UML diagram in Lucidchart?
Everything you need to make a diagram
In addition to our online UML class diagram tool, Lucidchart offers support and training resources to help you branch out to any type of diagram.
Lucid Training


