Component Visualizer is a free Android app developed by Adam Siembida, designed to help circuit designers visualize the size of electrical components and ICs that go on PCBs they are designing. The app accurately draws a rectangle with the dimensions of the component to help users get an intuitive feel of the size. This feature is meant as an improvement over grabbing a ruler or set of calipers for visualizing the size of the footprint required by the component.

The size of components is often a crucial aspect during the selection process, but it can be challenging to get an intuitive feel of the size by merely looking at the measurements in a datasheet. The app is an easy-to-use solution to this problem. It is ideal for both beginners and experienced circuit designers who want to improve their workflow.