Start below, switch to full screen, and inspect the entire panel on a clean black background.
Screen Tester is a free, browser-based screen testing tool that lets you inspect monitors for backlight bleed, glow, and bright display defects.
A black screen test gives you a clean dark background for checking monitor defects that are easier to see when the panel should be almost completely dark. It is commonly used for backlight bleed, IPS glow, bright spots, and hot pixels.
If you need the opposite type of check, use the white screen test for stuck pixels, tint, and uniformity inspection on bright backgrounds.
Yes. Backlight bleed usually becomes much easier to notice on a dark screen in a dim room, especially around the corners and edges.
They help with different things. Black is useful for bright defects and bleed, while white and RGB screens are often better for confirming dead or stuck pixels.
Yes. Start the display test and switch into full-screen mode for a cleaner inspection surface.
