Dead Pixel Test & Stuck Pixel Fixer (Online Tool)
Locate and fix screen defects. Use the color buttons to find dead pixels. Use the 'Start Fixer' button to attempt repairs on stuck pixels (flashing light therapy).
How to Use the Fixer Tool
If you find a pixel that is stuck on a specific color (not black), try our 'Start Fixer' tool.
- Dead Pixel: A pixel that is permanently off. It will appear as a tiny black dot on all color backgrounds. This is easiest to find during the white screen portion of the test.
- Stuck Pixel: A pixel stuck on one color (red, green, or blue). This becomes obvious when viewing a background of a different color. A stuck pixel is a common issue our dead pixel test can find.
- Hot Pixel: A pixel that is permanently on, showing as a bright white dot. It is most noticeable on the black background of the test.
Frequently Asked Questions
What is a dead pixel?
A dead pixel is a pixel that fails to light up and appears as a black dot on the screen. This is different from a stuck pixel, which is stuck on a single color, or a hot pixel, which is always white. Our dead pixel test helps you identify all these types.
How reliable is an online dead pixel test?
An online dead pixel test like this one is very reliable. It simply uses your web browser to display full-screen colors, which is all that is needed to visually identify pixel defects. No software installation is required.