The Ultimate Free Dead Pixel Test
Worried about your new monitor? Use our free, easy-to-use dead pixel test to quickly check any screen for dead, stuck, or hot pixels. No installation needed.
Start Dead Pixel Test NowA Full Suite of Professional Screen Test Tools
Dead Pixel Test
Our core tool. Cycle through solid colors to easily spot dead, stuck, or hot pixels on your screen.
Test Now →Refresh Rate Test
Use the UFO test to verify your monitor's refresh rate (Hz) and check for screen tearing or stuttering.
Test Now →Backlight Bleed Test
A simple black screen test to reveal backlight bleed and clouding issues on LCD monitors.
Test Now →Ghosting Test
Check your monitor's response time and identify motion blur or "ghosting" with this test.
Test Now →Viewing Angle Test
See how colors and contrast shift when viewing your screen from different angles.
Test Now →Text Clarity Test
Check for text sharpness and color fringing, crucial for reading and office work.
Test Now →Input Lag Test
Measure your total system reaction time, including monitor and mouse latency.
Test Now →Articles
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Understanding the Dead Pixel Test
A dead pixel test is the most fundamental and important check for any new or used monitor. Pixel defects can be distracting and are often covered by manufacturer warranties. Our tool makes it easy to find these issues without any software installation.
What Are You Looking For?
When you run the dead pixel test, you are looking for any pixel that behaves abnormally. There are three main types of pixel defects:
- Dead Pixels: These are pixels where all three sub-pixels (red, green, and blue) are permanently off. They appear as a small black square and are the easiest to spot on a white or bright-colored background.
- Stuck Pixels: This occurs when one or two sub-pixels are permanently on. This results in a pixel that is stuck on a single color - red, green, blue, cyan, magenta, or yellow. A stuck pixel is best found by cycling through all the solid colors in our test.
- Hot Pixels: This is when all sub-pixels are permanently on, making the pixel always appear white. A hot pixel is most noticeable during the black screen portion of the dead pixel test.