When to use it
Use the white screen when you need a bright, uniform surface for checking dust, fingerprints, pressure marks or uneven backlight. Switch to black for light bleed, then red, green and blue to inspect sub-pixel problems.
privacy-first display utility
White screen test for pixels, dust and display checks.
Fill your screen with pure white, black, RGB colors, gray or a custom HEX color. Use the grid when you need to inspect dead pixels or uneven backlight.
- No signup
- Runs locally
- Exit with Esc
- No ads over the test screen
screen control
Start a fullscreen test
#FFFFFFCurrent screen color
Use a HEX color like #FFFFFF. Fullscreen depends on your browser permission.
Ready. Choose a preset or start the white screen.
Safe fullscreen behavior
The tool opens a browser-controlled fullscreen layer. Press Esc or use the fixed Exit button. The test screen does not contain ads, forms or navigation while it is active.
Pixel grid mode
Turn on the grid when a flat color is not enough. It helps your eye separate a stuck pixel, tiny speck of dust or panel pattern from the rest of the display.
How to run a quick display check
- Clean the screen lightly so dust does not look like a pixel defect.
- Start with white, then switch to black, red, green and blue.
- Look from the normal viewing distance first, then inspect closer only if something stands out.
- Use the grid for suspicious spots and press Escape when done.
Common questions
Is this a dead pixel test?
It can help you spot dead or stuck pixels, but it is not a repair tool. Solid colors and grid mode make defects easier to notice.
Does it work on phones?
Yes. Mobile browsers may handle fullscreen differently, but the test layer and color controls still work.
Does the tool store my data?
No account, upload or server-side processing is required. Color choices stay in the browser session.