Black Screen is a browser-based application for testing black screens that is intended for everyday users, gamers, and experts that seek precise monitor diagnostics. The ability to initiate a pure black screen mode with a single click is a valuable tool for identifying backlight bleed issues, highlighting inactive pixels, and examining screen uniformity across LCD, LED, and OLED panels. It has a the dead pixel detection mode makes it simple to identify defective or stuck pixels that degrade display quality, and the backlight bleed test finds undesired light leaks around the edges of your laptop or monitor screen.