Block diagram software

Everything you need to create block diagrams

By registering, you agree to our Terms of Service and you acknowledge that you have read and understand our Privacy Policy.

See why teams choose Lucidchart

UML markup

Easily create sequence diagrams from text. Markup follows common industry standards, keeping diagram creation simple and efficient.

Try it now

Real-time or anytime collaboration

Make teamwork simple. Work together on a block diagram and use commenting, sharing, and revision history features to keep everyone on the same page.

Learn more

100+ integrations with leading apps

Connect Lucidchart with apps from top providers such as Atlassian, Google, Microsoft, Slack, and more.

View all integrations

Powerful AI functionality

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

See what's possible

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.

Explore now

Receiver block diagram

Blank ERD

UML interaction overview diagram

UML class

BPMN 2.0 Example

Current vs future state flowchart

Cisco network diagram

Blank diagram

Flowchart with swimlanes

Business process flow example

Concept map

Mind map