Dead Pixel Tester – Free Online Screen Test Tool
Use our free dead pixel tester to identify dead, stuck, and defective pixels on your monitor, laptop, TV, tablet, or smartphone. Switch between different solid colors and fullscreen mode to easily spot display issues without installing any software.
Why Use a Dead Pixel Tester?
Quick Benefits
Detect Dead Pixels
Identify pixels that remain permanently black and fail to display any color.
Find Stuck Pixels
Discover pixels that are locked on a specific color and not functioning correctly.
Test Any Display
Works with monitors, laptops, TVs, tablets, and mobile devices.
No Software Required
Run the test directly in your browser without downloads or installations.
How to use the Dead Pixel Tester tool?
How to use
Step 1
Launch the testing tool above.
Step 2
Enter fullscreen mode for the best viewing experience.
Step 3
Carefully inspect the screen for pixels that remain black, bright, or display incorrect colors.
Step 4
Use the screen for testing, cleaning, or focus purposes.
Step 5
Exit fullscreen mode when testing is complete.
What Is a Dead Pixel?
A dead pixel is a defective pixel on a display that no longer functions correctly. It typically appears as a small black dot that remains visible regardless of the color displayed on the screen.
Dead pixels can occur due to manufacturing defects, physical damage, or normal wear over time. They are most noticeable when viewing solid color backgrounds.
What Is a Stuck Pixel?
A stuck pixel differs from a dead pixel because it remains fixed on a particular color, such as red, green, blue, or white. Unlike dead pixels, stuck pixels may sometimes be corrected using pixel repair techniques or specialized software.
Running a dead pixel test helps distinguish between dead and stuck pixels.
What is the difference between a dead pixel and a stuck pixel?
A dead pixel remains permanently black, while a stuck pixel displays a constant color such as red, green, blue, or white.
Can dead pixels be fixed?
True dead pixels are usually permanent and cannot be repaired. Stuck pixels may sometimes be recoverable.
How do I find dead pixels on my monitor?
Display solid colors in fullscreen mode and inspect the screen carefully for abnormal pixels.
Is this dead pixel tester free?
Yes, the tool is completely free and works directly in your browser.
Does it work on mobile devices?
Yes, you can test smartphone and tablet screens as well as desktop monitors.