Dead Pixel Test
Diagnostic ToolFree fullscreen dead pixel test tool. Cycles pure solid test colours (White, Black, Red, Green, Blue, Cyan, Magenta, Yellow) on click or auto-timer.
Key Highlights
What People Use Dead Pixel Test For
New Monitor Inspection
Test a newly delivered laptop or gaming monitor for dead or stuck subpixels before return windows close.
Distinguish Dead vs Stuck Pixels
Black spots on white signify dead pixels; colored dots on black signify stuck subpixels.
Display Uniformity Checking
Cycle through full screens to check edge light leakage and color tint variance.
Dead Pixel Test FAQs
What is the difference between a dead pixel and a stuck pixel?
A dead pixel remains permanently black across all colors because no power reaches the transistors. A stuck pixel is locked onto one color (red, green, or blue) and stands out against contrasting backgrounds.
How do I use this dead pixel checker?
Click "Open Fullscreen" or press "F". Click anywhere on the screen or press the Spacebar to cycle through each test color. Clean your screen first so dust particles are not mistaken for dead pixels.
Can stuck pixels be fixed?
Sometimes! Rapid color cycling or gentle micro-massaging with a microfiber cloth can occasionally unstick transistors, though permanent physical defects require manufacturer warranty replacement.
Related Screens
White Screen
Instant fullscreen pure white screen (#FFFFFF). Zero ads or popups. Perfect for monitor cleaning, dead pixel detection, reading light, and video illumination.
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.
Gray Screen
Precise 50% mid-gray fullscreen screen (#808080). Test monitor uniformity, dirty screen effect (DSE), banding, and color temperature consistency.
Red Screen
Fullscreen vibrant red screen (#FF0000). Preserve night vision, create darkroom mood lighting, or test your display for dead or stuck red subpixels.
Green Screen
Fullscreen pure chroma green (#00FF00). Great for chroma key backdrops, video keying tests, and inspecting display green subpixels.