Block diagram maker

Visualize systems and how they interact with Lucidchart. Create a free block diagram online with our intelligent diagramming software and get an overview of your entire system—no matter how complex.

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Block diagram software made simple

Learn how our block diagram generator can help you create block diagrams, including functional block diagrams, with ease.

Use built-in shapes

We make building a block diagram easy—our shape libraries include hundreds of industry-standard symbols and notations for things like electrical components, audio systems, and more.

Try a block diagram template

For an even faster start, begin with one of our customizable block diagram templates. Once you’ve built your diagram, use our intelligent formatting features and Lucid AI to arrange it to your liking.

Collaborate with ease

Our block diagram generator with AI helps you communicate a high-level overview of your system to less technical stakeholders. Take advantage of powerful collaboration features, such as in-editor chat, comments, and @mention notifications, to enable teams to work together in real time.

Work anywhere

Our AI block diagram software is cloud-based, so you can work from anywhere, no matter what browser, operating system, or device you prefer to use.

Leverage Lucidchart’s integrations

Insert block diagrams that you have created in Lucidchart directly into Confluence wikis and Jira issues using our Atlassian apps. Include a link to your live Lucidchart document to provide more context for pull requests within GitHub. Thanks to integrations with platforms like Google Workspace, Microsoft Office, Microsoft Teams, and Slack, you can access, edit, and share your diagrams from anywhere.

Trust our excellent reviews

Need a second opinion? Take a look at our reviews on third-party apps like Capterra, G2, and TrustRadius. We have thousands of five-star ratings and glowing reviews.

Lucidchart feature highlights

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

Block diagram templates

Use a free template from our gallery to start working on your block diagram.

Receiver block diagram

Go to Receiver block diagram template

UML communication diagram

Go to UML communication diagram template

UML interaction overview diagram

Go to UML interaction overview 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 block diagram?

A block diagram is a specialized flowchart that engineers use to visualize systems and how they interact. Block diagrams give you a high-level overview of a system so you can account for major system components, visualize inputs and outputs, and understand working relationships within the system. Use Lucidchart’s block diagram creator to tackle complex system overviews when designing hardware or software and implementing process improvements.

How to make a block diagram

Start to visualize the system

Begin with a blank canvas or one of our templates. Identify the components, inputs, and outputs of the system you’re diagramming.

Add symbols

Drag and drop symbols and notations from Lucidchart’s shape library onto your canvas. Connect the shapes in your block diagram with arrows to indicate the flow of data.

Label inputs and outputs

Identify and label the input at the beginning of your block diagram and do the same for the output at the end.

Present, publish, or share

Present your block diagram directly from Lucidchart with Presentation Mode or share it. You can send it to others as a published link or by using one of our supported integrations.

Additional Lucidchart resources

Lucid Training Labs

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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 block diagrams

Does Lucidchart have block diagram templates to help me get started?

Yes! Lucidchart’s vast template gallery includes block diagram templates to help users visualize technical systems. Make your block diagram look professional with our shape libraries that include industry-standard symbols and notations.

What are the options for sharing my block 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 web page.

How can I show the difference between current and future states?

Use layers to visualize current, ideal, or future states of any process or system side by side. Start with a basic block diagram showing your current system, then create a layer depicting any future optimizations to your system. Use hotspots to toggle between layers.

What is a block diagram in control systems terminology?

A block diagram represents a control system in diagram form. A block represents each element of the control system, and the block symbolizes the transfer function of that element.

What are the advantages of a block diagram?

Block diagrams help you visualize each individual element of a complex system, which helps you wrap your mind around complicated systems as a whole.

What are the fundamental symbols of a block diagram?

Block diagrams use shapes to contain each element of the system, usually a simple box or circle. Lines connect the shapes to show how they relate to each other within the system.

Everything you need to make a diagram

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

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