Test Your Screen for Dead Pixels Right Now

Free online dead pixel and monitor test - runs instantly in your browser, no download or signup. Cycle through color screens to catch dead pixels, stuck pixels, flickering, and uniformity issues, then check brightness, contrast, and color accuracy with the rest of our display testing tools.

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Quick, free checks for the hardware you use every day. No downloads, no sign-up, and nothing leaves your browser.

Full-Screen Color Tests

Full-screen white, black and color screens for finding dead pixels, stuck subpixels, backlight bleed and uneven color.

White Screen

Pure white full screen for display testing and screen cleaning

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Black Screen

Pure black full screen for testing dark areas and contrast

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Color Screen

Fill your screen with pure red, green, blue or any other color to find stuck subpixels, check color tint and uniformity, or use it as a backdrop.

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Run a full monitor test right in your browser - no download, no install. Pick a single test below, or work through them in order the way a careful buyer checks a new monitor.

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Fix Your ScreenDead Pixel Fixer

Attempt to repair stuck pixels with our free online tool. Using rapid color stimulation and multiple repair modes, our Dead Pixel Fixer works to revive stuck pixels on LCD, LED, and OLED displays. Results vary by pixel and panel type and aren't guaranteed - it's free and worth trying before a warranty claim.

Multiple Modes

RGB, RGB+White+Black, Random

Fullscreen Support

Optimal coverage & immersion

Real-time Stats

FPS & elapsed time tracking

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Test Your Monitor

Work through a complete monitor check - dead pixels, uniformity, backlight bleed, response time and more - in one step-by-step guide.

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Dead Pixel Repair Methods & Understanding

When pixels get stuck, several approaches exist, some with better success rates than others. This guide explains what happens with stuck pixels and various methods people have tried.

Physical Pressure (Limited Success)

Some users report attempting to gently apply pressure around the affected area with a soft cloth. The theory is that mechanical pressure might help reset the stuck transistor. However, this method is risky and rarely successful. Always use extreme caution to avoid additional damage.

Power Cycle and Wait

Switch the display off, unplug it for a few hours and check again. Some stuck pixels clear on their own in the first days after they appear, so recheck before trying anything else. Never apply heat, moisture or force to a panel - it can cause permanent damage and may void your warranty.

Color Stimulation (Most Accessible)

The most commonly attempted method uses software to rapidly flash colors at the stuck pixel location. The theory is that sustained electrical stimulation might help reset the transistor's state. It doesn't always work, but this approach is completely safe and carries no risk of additional hardware damage. It's the method most worth trying first.

Warranty & Replacement (Most Reliable)

Most monitors include warranties covering manufacturing defects. Typically, manufacturers accept 1-3 dead pixels as normal, but if you exceed their threshold, professional replacement is often the most reliable solution. Contact your manufacturer's support to understand your specific warranty.

Important Considerations

Stuck pixels (showing color) have better repair prospects than dead pixels (completely black). Understand which type you have before attempting fixes.
Results vary widely and aren't guaranteed. Age matters: pixels stuck for hours respond better than those stuck for weeks.
Check your warranty first. Many manufacturers will replace displays if pixel issues exceed their acceptable defect thresholds.

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