Dead pixel test
Fill your screen with five solid colors, one at a time, and look for dots that don’t match.
Full screen · 5 colors · click or press → for the next
What you’re looking for
Dead pixel
Black on every color. The pixel gets no power, so it never lights up.
Stuck pixel
Shows one color (often red, green or blue) on every background. A subpixel is stuck on or off.
Hot pixel
White or very bright on black. All of its subpixels are stuck on.
Dust or a smudge
Moves, blurs or wipes away. Not a pixel fault — clean the screen and look again.
How to run it
- Wipe the screen with a dry microfiber cloth so dust doesn’t look like a dead pixel.
- Start the test. Each color fills the screen; click or press → for the next one.
- On each color, scan the screen section by section from your usual viewing distance.
- Note where any dot sits and which colors it shows on — that tells you what kind it is.
More screen tools
Refresh rate test
See your screen’s real Hz and spot stutter.
Screen test
Gradients, black level, uniformity, gamma and sharpness.
Test pattern
Color bars and a test card at your native resolution.
Zoom light
A soft, warm light for video calls from a spare screen.
Background images
Plain color PNGs for desktops, phones and 4K.
Questions
What’s the difference between a dead and a stuck pixel?
A dead pixel stays black on every color. A stuck pixel stays one color, or stays bright on black. Stuck pixels sometimes recover; dead ones almost never do.
Can a dead pixel be fixed?
Usually not — it’s a hardware fault. A stuck pixel can sometimes be unstuck by flashing it with rapidly changing colors; try the stuck pixel fixer.
Does this work on phones, laptops and TVs?
Yes. Open the page in the device’s browser. For a TV without a browser, download solid color images and show them from a USB stick.
Is one dead pixel covered by warranty?
It depends on the manufacturer’s pixel policy: some replace a screen for a single bright dot, others need several. Check yours and the store’s return window.