UML diagram software

Everything you need to create a UML diagram

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See why teams choose Lucidchart

Cross-team collaboration and alignment

Collaborate with all the right people in your org to visualize the architecture, design, and implementation of complex software systems.

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Understand and clarify complexity

Track relationships and hierarchies using UML (Unified Modeling Language) to communicate about systems in a standardized, visual way.

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Streamline your tech stack

Integrate Lucidchart with the industry-leading apps that engineering teams use most—including Jira, LeanIX, Notion, and more.

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Powerful AI functionality

Use AI in Lucidchart to effortlessly transform text prompts into polished flowcharts and diagrams that you can iterate on.

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Get started faster with templates

Not sure how to diagram a system, process, or algorithm? Explore hundreds of Lucidchart templates for ideas and frameworks that make it easy to organize information visually.

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UML class diagram

Activity diagram

UML use case diagram

DBMS ER diagram (UML notation)

ERD with colored entities (UML notation)

UML sequence: Web application authentication

Logic model

Generic Network Diagram Template

Sequence diagram

Web sequence diagram

Company high-level systems overview example

Algorithm flowchart example