Dead Pixel Test Online

Test your screen for dead or stuck pixels with full-screen colors.

White

Cycle interval

Brightness: 100%

High brightness can feel harsh in a dark room. Lower brightness if your eyes feel strained.

Shortcuts: F fullscreen, Esc exit fullscreen where supported, Space controls, 1-9 preset colors, arrow keys cycle test colors. In dead pixel fullscreen, tap to advance and swipe left or right to change colors.

Used Monitor Test Checklist

Checklist coming soon.

Quick answer

Test your screen for dead or stuck pixels with full-screen colors.

Summary

What it does	Test your screen for dead or stuck pixels with full-screen colors.
Best for	Lighting, focus, display checks or simple fullscreen use depending on the page.
Exit	Press Esc where supported or use the on-screen exit button.

How to test for dead pixels

Clean the screen first. Open fullscreen. Check each solid color slowly from edge to edge. A dead pixel may appear as a tiny dark dot.

Move your eyes across the full screen, including the corners. Dust can look like a bad pixel, so wipe the screen gently before deciding.

What colors to use

Use white, black, red, green, blue and yellow. Different colors can reveal different stuck or dead pixels.

White helps reveal dark pixels. Black helps reveal bright stuck pixels. Red, green and blue can show subpixel problems.

Manual and auto-cycle modes

Manual mode gives you time to inspect each color. Auto-cycle is useful for a quick pass when you already know what to look for.

Use the interval selector if the colors change too quickly. Pause auto-cycle when you see something you want to inspect. In fullscreen, tap to advance to the next color or swipe left and right on touch screens.

Step checklist

1. Clean the screen gently. 2. Open fullscreen. 3. Check white, black, red, green, blue, yellow, cyan, magenta and gray. 4. Pause on any suspicious mark. 5. Take photos if you need to document a new device issue.

If the screen is under warranty, check the seller or manufacturer policy before trying anything risky. This is not legal advice.

Dead pixel vs stuck pixel

A dead pixel usually stays dark. A stuck pixel may stay red, green, blue or another color. This tool helps you spot issues, but it does not repair hardware.

If your display is under warranty, take photos and check the maker's pixel policy.

Tool category

Browse more tools in Screen Tests.

White ScreenOpen a clean white screen for light, focus and cleaning.Black ScreenUse a black screen for low light, focus and display checks.Color ScreenPick any full-screen color with HEX or RGB controls.Monitor TestCheck colors, gradients, grids, sharpness and backlight.

What Is a White Screen Used For?Learn practical uses for a white screen, including light, video calls, cleaning, focus and monitor checks.How to Test a Monitor for Dead PixelsUse solid full-screen colors to check a monitor, phone or tablet for dead or stuck pixels.

FAQ

Can this repair a dead pixel?

No. It only helps you find possible pixel problems.

Should I use auto-cycle?

Auto-cycle is useful for a quick pass. Manual mode is better when you want more time on each color.