Full-screen display checker

Free Dead Pixel Test

A dead pixel test fills your display with solid colors and diagnostic patterns so defective pixels are easier to spot. Inspect black, white, red, green, blue, gray, and custom screens without uploading anything.

Guided display inspection

Run the monitor test

Arrow keys supported
Black1 / 10

Before you start: clean the screen gently. Dust can look exactly like a dead pixel.

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  • 10 color and pattern screens
  • Full-screen, keyboard, and touch controls
  • Optional automatic 3-second cycling

Read the result correctly

Dead pixel, stuck pixel, or dust?

Dead pixel

Usually stays black on every color because it no longer produces light.

Stuck pixel

Stays red, green, blue, or white on multiple screens because a subpixel remains on.

Dust or mark

Often changes when viewed from an angle or disappears after safe screen cleaning.

Do not press, tap, or rub a suspected pixel. Physical pressure can permanently damage the display panel. Check the manufacturer's pixel-defect policy if the monitor is under warranty.

Four simple steps

How to test your monitor

Use the native resolution and inspect the same spot across several colors before classifying a pixel.

  1. 1

    Prepare the display

    Clean the screen, choose its native resolution, and reduce reflections in the room.

  2. 2

    Start the screen test

    Open the guided test and enter full screen for the clearest inspection.

  3. 3

    Inspect every color

    Cycle through black, white, red, green, blue, gray, and the diagnostic patterns.

  4. 4

    Confirm suspicious pixels

    Recheck the same spot on several colors and clean the panel before deciding it is a pixel defect.

Fast controls

Keyboard shortcuts

Use the test without taking your eyes off the display. On touch devices, the same controls stay available as large buttons.

← / ↑
Previous
→ / ↓ / Space
Next
I
Hide controls
Esc
Exit test

Common questions

Dead pixel test FAQ

What is a dead pixel test?

A dead pixel test fills the screen with solid colors so pixels that stay black, bright, or the wrong color are easier to see.

What is the difference between a dead pixel and a stuck pixel?

A dead pixel usually stays black because its subpixels no longer light. A stuck pixel stays on one color, often red, green, blue, or white.

Can this test fix a dead or stuck pixel?

No. This tool helps you inspect and document a display problem; it does not repair pixels. Avoid pressing or rubbing the panel because that can damage it.

How should I prepare my monitor for testing?

Clean the screen gently, use the display's native resolution, let the monitor warm up, dim room lights, and inspect each color from a normal viewing distance.

Does the dead pixel test upload anything?

No. Every test color and pattern runs in your browser. The tool does not capture, upload, or analyze your screen.

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