Gray Screen
Hardware TestPrecise 50% mid-gray fullscreen screen (#808080). Test monitor uniformity, dirty screen effect (DSE), banding, and color temperature consistency.
Pure 100% Fullscreen
Screen Wake Lock keeps display awake. Cursor hides automatically after 2.5s of idle time while fullscreen.
Key Highlights
What People Use Gray Screen For
Dirty Screen Effect (DSE) Test
Spot uneven patches, mura, and cloudy spots in LCD backlights and OLED layers.
Gamma & Vignette Check
Expose edge brightness falloff in ultra-wide displays and budget monitors.
Neutral Color Calibrating
Provides a reference neutral grey to calibrate room lighting and white balance.
Gray Screen FAQs
Why is a gray screen the best monitor test?
Mid-tones like 50% gray immediately expose backlight inconsistencies, OLED vertical banding, and dirty screen effect that pure black or white can hide.
How do I test my screen properly?
Dim your room lights, open this page in fullscreen (press F), and inspect the corners, center, and edges for darker or tinted blotches.
Related Screens
Black Screen
Instant fullscreen true black screen (#000000). Turn off OLED pixels, test for backlight bleed on IPS displays, rest your eyes, or save energy.
White Screen
Instant fullscreen pure white screen (#FFFFFF). Zero ads or popups. Perfect for monitor cleaning, dead pixel detection, reading light, and video illumination.
Dead Pixel Test
Free fullscreen dead pixel test tool. Cycles pure solid test colours (White, Black, Red, Green, Blue, Cyan, Magenta, Yellow) on click or auto-timer.
Custom Colour Screen
Pick any custom fullscreen colour using an interactive colour wheel or hex/RGB code. Share your exact colour with custom shareable links (?c=).