Monitor Test
Monitor Test
Check your monitor for dead pixels: black, white and color screens.
How to use
Click a color button — the screen will fill with that color. Look for pixels that do not match. Press ESC to exit.
Monitor Test
Click a color for fullscreen test. ESC to exit.
Limitations
Some browsers limit fullscreen mode. For IPS panels, check viewing angles.
Dead pixel: how to find it in 5 minutes without software
A dead pixel is a dot on the screen that is permanently stuck on one colour or has stopped lighting up entirely. Spotting it on a regular desktop is almost impossible because it gets lost among icons and windows. This test fills the entire screen with a solid colour — making any abnormal dot immediately visible. It's recommended to check black, white and the primary colours. A black dot on a white background is a dead pixel. A bright dot on black is a stuck pixel. On IPS panels, pay particular attention to backlight uniformity across the corners of the screen. Before buying a second-hand laptop or monitor, this test is an essential first step.
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