UML diagram maker

No matter the kind of UML diagram you have in mind, our UML diagram tool can help you get to work on it right away, with autofill features and shape libraries to give you a head start.

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Easy, intuitive UML diagrams Get to work on your UML diagram in minutes with Lucidchart.

Get to work on your UML diagram in minutes with Lucidchart.

Versatile diagramming

Lucidchart supports all types of UML diagramming, including both structural and behavioral diagrams. No matter what project you have in mind, you can diagram it with Lucidchart.

Built-in shape library

Our shape library has what you need for your UML diagrams. With our UML diagram creator, you can make your diagrams look professional and build them with best practices in mind.

UML sequence markup tool

If you’re building a UML sequence diagram, Lucidchart streamlines the process with our UML markup tool. You can auto-generate a sequence diagram from the text you enter in the sequence markup tool.

Leverage Lucid AI

Use Lucid AI to create UML diagrams faster than ever. Simply enter text prompts to generate professional visuals and then iterate until you have the exact documentation you need.

Collaborate in real time

Invite people to view, edit, or give real-time feedback on your UML diagram using comments and @mentions. Review individual contributions by enabling collaborator colors, and use revision history to see changes or revert to a previous version.

Get an easy-to-use UML diagram with templates

Start with a template or build your diagram from scratch using UML shapes in Lucidchart’s shape library. Link data within your diagram from spreadsheets or add formulas to reference parent-child relationships between shapes.

Boost productivity with 100+ integrations

Connect Lucidchart to apps from leading providers like Google, Microsoft, and Slack. Explore the Lucid integrations marketplace for apps to streamline communication, strategic planning, task management, and more.

Lucidchart feature highlights

Streamline work by enabling multiple collaborators to create and edit the same diagram at once.

UML diagram templates and examples

Use a template from our gallery to get a head start on your UML diagram.

Activity diagram with swimlanes

Go to Activity diagram with swimlanes template

UML class diagram

Go to UML class diagram template

Web sequence diagram

Go to Web sequence diagram template

Getting started in Lucidchart

Follow along with this video tutorial and learn how to make any type of diagram in Lucidchart.

Make a diagram

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 diagram?

Unified modeling language (UML) diagrams describe the structure of a system, the objects within the system, and how they all behave. While you’ll find many types of UML diagrams, they fall into two broad categories: structural diagrams and behavioral diagrams.

How to create a UML diagram

Enable the UML shape library

Open the shape manager in Lucidchart and select the UML library, which includes all the UML shapes, symbols, and notation.

Use sequence markup to automate the process

Speed up the process of creating your UML diagram. Under the UML Sequence category in the toolbar, click “Use Markup,” type your markup, and click “Build.”

Identify and add UML components

Drag and drop shapes onto your blank canvas to start work on your UML diagram. Connect these shapes using arrows to indicate relationships and flows.

Add text to your UML diagram

Label and arrange your use cases, flows, and actors to clearly communicate their purpose.

Publish and share

Share your UML diagram with other teams or stakeholders. Embed your diagram in a wiki, send it in an email, or share it with integrations like Jira, Confluence, and Slack.

Additional Lucidchart resources

Lucid Training Labs

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Help center

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Lucidchart tutorials

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

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Collaborate with AI

Get an overview of Lucid’s AI functionality and find additional resources.

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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.

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Frequently asked questions about UML diagrams

Can I build a UML diagram using markup?

Yes. First, you will need to enable the UML sequence diagram shape library. Then, Lucidchart provides a UML sequence markup feature that auto-generates a sequence diagram based on the text you provide.

How can I change the formatting of a UML diagram?

You can add styling and formatting to your UML diagram using the Properties bar at the top of the Lucidchart editor.

Can I show the difference between current and future states within the UML diagram?

Yes, use the layers feature to visualize current, ideal, or future states of any process or system side by side. Start with your current system and then create a layer depicting future states. Use hotspots to toggle between layers.

Learn more

What are the options for sharing my UML diagram in Lucidchart?

Publish and share diagrams with Lucidchart users and non-users via email, shared link, PDF, or image file. You can also share your diagram on social media or embed it onto any webpage.

Everything you need to make a diagram

In addition to our online UML diagram tool, Lucidchart offers support and training resources to help you branch out to any type of diagram.

Lucid Training