Dead Pixel Test
Check for dead pixels on your screen with full-screen solid colors.
Ready to Test?
Enter fullscreen mode and cycle through the colors. Look for tiny black dots (dead pixels) or bright colored dots (stuck pixels).
Press ESC to exit anytime.
What to look for?
Dead Pixels
Look for black spots on a white or colored background. These pixels are effectively "off" and don't light up.
Stuck Pixels
Look for bright dots (red, green, blue) on a black background. These are pixels "stuck" on a specific color.
What is dead pixel test?
A dead pixel test is a simple yet effective way to check your monitor or mobile screen for defective pixels. Pixels are the tiny colored dots that make up your display. Sometimes, due to manufacturing defects or damage, a pixel might stop changing colors (becoming a 'stuck pixel') or turn completely black (a 'dead pixel').
This tool fills your screen with solid colors—White, Black, Red, Green, and Blue—allowing you to easily spot any irregularities. A dead pixel will appear as a black dot on a white background, while a stuck pixel might show up as a bright red, green, or blue dot on a black background. Checking for dead pixels is especially important when you buy a new device or monitor to ensure you received a defect-free product.
How to use dead pixel test
- Step 1: Clean your screen gently with a microfiber cloth to ensure no dust particles are mistaken for dead pixels.
- Step 2: Click the 'Start Test' button to enter fullscreen mode.
- Step 3: Click your mouse or tap the screen to cycle through the solid colors (White, Black, Red, Green, Blue).
- Step 4: Look closely at every part of the screen for any tiny dots that don't match the background color.
- Step 5: Press 'Esc' to exit the test.
Frequently Asked Questions
What is the difference between a dead pixel and a stuck pixel?
A **dead pixel** is permanently off and appears as a black dot. A **stuck pixel** is stuck displaying a specific color (red, green, or blue) and is often easier to fix.
Can dead pixels be fixed?
Dead pixels (black dots) are usually permanent hardware failures. However, stuck pixels (colored dots) can sometimes be unstuck using rapid color flashing tools like our Stuck Pixel Fixer.
Is this test safe for my screen?
Yes, absolutely. This test simply displays static colors and causes no harm to any type of display (LCD, OLED, IPS, etc.).