PiXel Check is a free utility application for Mac that specializes in identifying dead, stuck, or defective pixels on LCD monitors. The program operates by displaying solid colors—red, green, blue, black, and white—on the screen, enabling users to easily detect any malfunctioning pixels against the uniform backgrounds. This straightforward approach allows for quick and effective pixel inspection, making it a valuable tool for anyone concerned about display quality.

The functionality of PiXel Check revolves around its ability to activate and deactivate RGB sub-pixels, facilitating accurate detection of pixel defects. Users can visually inspect their monitors for bright dots or dark spots while the screen is filled with solid colors. For optimal results, it is advisable to clean the monitor before starting the inspection. Alternative methods for pixel testing are available online, but PiXel Check provides a focused and dedicated solution for pixel diagnostics.