Dead Pixel Test - Screen Checker

    Test your screen for dead, stuck, or hot pixels with solid color displays

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    Read the complete guide for in-depth tips and troubleshooting.

    What Is a Dead Pixel Test?

    A dead pixel test cycles through solid colors — red, green, blue, white, black, and gray — so you can spot dead, stuck, and hot pixels on any monitor, laptop, phone, or TV. Catching defects early helps with warranty claims and quality checks before you keep a new display.

    How to Run a Pixel Test Online

    1. Open the Pixel Test and enter fullscreen
    2. Click or press keys to cycle through each test color
    3. Inspect the entire panel, especially corners and edges
    4. Repeat in a dim room for best visibility
    5. Note any bright or dark dots that should not be there

    When to Use a Pixel Test

    New monitor QA

    Test within the return window

    Used display purchase

    Verify condition before paying

    Laptop inspection

    Quick check on refurbished machines

    Phone screen check

    Fullscreen colors on mobile

    Projector panels

    Spot stuck mirrors or dust

    Repair verification

    Confirm fixes after service

    People Use Pixel Tests For

    Dead pixel test online free

    No download — instant color cycle in the browser

    Stuck pixel check

    Bright dots on black reveal stuck sub-pixels

    Monitor test before buying

    Five-minute check saves costly mistakes

    Related Tools

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    Frequently Asked Questions

    What is a dead pixel test?

    A dead pixel test displays solid colors on your screen to help identify dead, stuck, or hot pixels. Dead pixels appear as black dots, stuck pixels show a single color, and hot pixels appear as bright white dots.

    How do I test for dead pixels?

    Open the pixel test in fullscreen mode and cycle through each color (red, green, blue, white, black, gray). Look carefully for any pixels that do not match the displayed color or remain a different color.

    What is the difference between dead and stuck pixels?

    Dead pixels are completely non-functional and appear black on all colors. Stuck pixels are stuck on one color (usually red, green, or blue) and appear as a colored dot regardless of the screen color.

    Can dead pixels be fixed?

    Dead pixels usually cannot be fixed. Stuck pixels can sometimes be fixed by running pixel-fixing software that rapidly flashes colors, or by gently massaging the affected area with a soft cloth.

    Should I test a new monitor for dead pixels?

    Yes. It is recommended to test new monitors, TVs, laptops, and phones for dead pixels within the return period. Most manufacturers have policies for returns if too many dead pixels are found.

    Is this dead pixel test free?

    Yes. The dead pixel test is completely free to use online without downloads or registration.