DefectPX is a free and open-source software designed to test monitors and screens for dead, stuck, or defective pixels. With multi-monitor support and an intuitive interface, users can test anytime and anywhere, even before purchasing or during the warranty period.

DefectPX boasts both primary and custom color support, as well as convenient mouse and keyboard shortcuts. Plus, with multi-monitor support and an intuitive interface, this software is a must-have for any frequent computer user.
The best part? DefectPX is completely free and open-source, and requires no installation – it's easily portable and ready to use at a moment's notice. So why wait any longer? Say goodbye to defective pixels and hello to clear and smooth displays with DefectPX.
Version 2.0.0: An improved and easier to use interface; multi-monitor support.