Screen & Dead Pixel Tester

Click color presets or enter full-screen mode to check monitor dead pixels, screen cleaning, or dark ambient lighting.

Custom

Monitor Specs Detected

Resolution
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DPR (Scaling)
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Color Depth
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Aspect Ratio
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Why use a black screen or dead pixel tester?

When purchasing a new monitor, TV, or smartphone, displays might have stuck pixels or dead pixels. Cycling through pure black, white, and RGB primary colors is the most accurate way to detect display hardware flaws.

How to exit full-screen mode?

Press the [ESC] key or [F11] key on your keyboard at any time to exit fullscreen mode.