Run a dead pixel test to find stuck or dead pixels on your screen. Works on phones, monitors, and TVs. Free and full screen.

Modern displays are designed to deliver sharp visuals and consistent colors across the entire screen. However, even high-quality panels can develop pixel defects over time or arrive with manufacturing issues. A dead pixel test helps users identify these problems clearly and quickly.

Using a simple online tool, anyone can check their screen for dead or stuck pixels without installing software. This makes it easy to evaluate display quality on phones, monitors, laptops, and televisions.

What Is a Dead Pixel?

A dead pixel is a pixel on a display that no longer responds correctly. It may appear permanently black, white, or show an incorrect color. This happens when one or more subpixels stop functioning.

In some cases, pixels are not completely dead but stuck on a single color. These are commonly referred to as stuck pixels and may behave differently from fully dead ones.

Why Dead Pixels Occur

Dead pixels can occur due to manufacturing defects, physical damage, or long-term wear. Excessive heat, pressure on the screen, or electrical issues may also contribute to pixel failure.

While modern displays have improved quality control, pixel defects can still appear, especially on older or heavily used screens.

What Is a Dead Pixel check?

A dead pixel test is a screen diagnostic method that displays solid colors such as red, green, blue, white, and black. These colors make it easier to spot pixels that do not behave as expected.

By switching between colors in full-screen mode, users can visually inspect the display and identify any abnormal pixels.

How an Online Dead Pixel Test Works

An online dead pixel test runs directly in the browser and fills the screen with uniform colors. When the display shows a solid color, any pixel that appears different becomes immediately noticeable.

This approach works on most modern devices and does not require special permissions or downloads.

Benefits of Using a Dead Pixel Test Tool

One major benefit is convenience. Users can run the test instantly on any device with a browser. This is useful when checking a new display or inspecting a used device before purchase.

Another advantage is clarity. Full-screen color tests provide a clear and simple way to detect pixel issues without technical knowledge.

Dead Pixel Test for Phones and Mobile Devices

Smartphones are frequently checked for dead pixels because users interact closely with small screens. Even a single defective pixel can be noticeable during daily use.

A dead pixel test helps confirm display quality after repairs, screen replacements, or long-term usage.

Dead Pixel Test for Monitors and TVs

Monitors and televisions often use larger panels where pixel defects may be harder to notice during regular content playback.

Running a full-screen dead pixel test allows users to inspect the entire panel evenly and identify subtle issues.

Dead Pixels vs Stuck Pixels

Dead pixels remain permanently inactive and usually cannot be fixed. Stuck pixels, on the other hand, may display a single color and sometimes recover over time.

Identifying the difference helps users decide whether a repair or replacement is necessary.

Tips for Accurate Testing

For best results, clean the screen before testing and perform the test in a dimly lit room. This reduces glare and reflections.

View the screen from a normal distance and take your time when switching between colors to avoid missing subtle defects.

Online Test vs Installed Software

Installed diagnostic software may offer additional features, but browser-based tools are faster and more accessible. They require no installation and work across platforms.

For most users, an online dead pixel test provides all the information needed to assess screen condition.

Conclusion

A dead pixel test is a simple yet effective way to evaluate screen quality. By displaying solid colors in full-screen mode, users can easily detect dead or stuck pixels.

Whether checking a new device, inspecting a used screen, or diagnosing a display issue, this test offers a quick and reliable solution accessible from anywhere.