Activity diagram maker

Map complex processes with precision using our UML activity diagram creator. Build professional, data-backed diagrams for any system.

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Explore what’s possible with our online activity diagram maker

Leverage dynamic capabilities designed to streamline your documentation and boost team productivity.

Clarify complex processes

Eliminate ambiguity in your workflows. Use UML activity diagrams to visualize multi-threaded logic and ensure your team stays aligned on every step.

Access shape libraries and symbols

Build technically sound process flows with specialized shape libraries. Access all the symbols you need to make complex activity diagrams clear.

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.

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

Real-time collaboration

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

Data linking

Create accurate diagrams faster by linking shapes to data from Google Sheets, Excel, or CSV files.

Conditional formatting

Transform data by visually highlighting patterns and insights for quick comprehension at a glance.

Layers

Add layers to visualizations for multiple levels, distinct visibility controls, and streamlined editing.

Revision history

Collaborate confidently—view changes, revert to prior versions, and ensure diagrams are up to date.

Shape libraries

Use existing shape libraries for Salesforce, enterprise architecture, and more—or customize your own.

AI prompt flow

Build and experiment with LLMs on the Lucid canvas. Test prompts and inputs to see what works best.

Lucidchart feature highlights

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

UML activity diagram templates and examples

Select one of our customizable templates to create a UML activity diagram online.

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

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 an activity diagram maker?

Think of an activity diagram as a high-level flowchart for complex systems. While standard flowcharts track simple logic, activity diagrams map the entire lifecycle of a process—from software logic to business workflows. Use them to visualize how actions transition and interact, ensuring your system stays aligned.

How to create an activity diagram online

Identify the scope of the goal

Define the process you want to model. Identify start and end points. Where does a trigger happen, and what is the last step of the finished process?

List the activities or actions

List out every individual task that happens between the start and endpoints. Use action verbs to keep it clear, like "Enter password" or "Grant access."

Establish the flow and decisions

Use arrows to connect the sequence of a process and diamonds to represent decision nodes where the process splits. Clearly label the guards and conditions to guide the reader through each path.

Group responsibilities by swimlanes

If your process involves different teams, departments, or software systems, add swimlanes to keep workflows organized.

Add concurrency forks and joints

Identify tasks that can occur at the same time. Use forks to split one flow into two or more parallel tasks. Use joints to bring those parallel tasks together.

Additional Lucidchart resources

Lucid Training Labs

Learn visual collaboration skills in free, self-serve courses and live training workshops.

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Lucid Community

Connect with other users to share tips and insights. Provide feedback to Lucid’s product team.

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Help center

Find detailed articles with step-by-step instructions for using specific Lucid features.

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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

Explore tips for optimizing collaboration, aligning teams, and driving initiatives in Lucidspark.

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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