Block diagram maker
Lucidchart is a visual workspace that combines diagramming, data visualization, and collaboration to accelerate understanding and drive innovation.Watch the Video
How to make a block diagram online
Start with a system to visualize
Start with a blank canvas, or select and edit one of our templates. Then identify all the components, inputs, and outputs within your system.
Add symbols to your block diagram
Use Lucidchart's drag-and-drop interface to add symbols and notation onto your canvas. As you build out your block diagram, connect shapes with arrows to indicate the flow of data.
Label inputs and outputs
Identify and label the input that starts your block diagram. Then identify and label the output that ends the block diagram.
Present, publish, or share
Present your block diagram with our in-editor presentation mode or share it directly as a published link or across any of our supported integrations.