Cycle through solid colors to detect dead, stuck, or bright pixels on your screen. Click the preview or hit Go Fullscreen for the best testing experience. Click or press any arrow key/spacebar to cycle colors in fullscreen mode.
A dead pixel test helps you check your monitor, laptop, smartphone, tablet, or TV for pixels that do not display colors correctly. These tiny defects can appear as black dots, bright spots, or colored points that stand out against the rest of the screen.
With our free online dead pixel test, you can display solid colors across your screen and inspect the panel for unusual pixels. The test works directly in your browser, so you can check your display without downloading software.
To get started, select a test color or open the fullscreen test. Examine the screen carefully, then switch between white, black, red, green, blue, and the other available colors to see whether any suspicious spots remain visible.
How to Use the Online Dead Pixel Test
Follow these simple steps to check your display:
- Clean your screen: Remove dust, fingerprints, and smudges that could look like dead pixels. Follow your device manufacturer’s cleaning instructions.
- Open the pixel test: Use the fullscreen option for a larger, unobstructed testing area.
- Check each color: Display white, black, red, green, blue, gray, yellow, cyan, and magenta one at a time.
- Inspect the entire display: Look across the center, corners, edges, and other areas for tiny dots that do not match the displayed color.
- Check suspicious spots again: Switch between several backgrounds to see whether the same spot remains visible.
- Record any defects: Note the location and appearance of each suspicious pixel, especially if the device is new or still under warranty.
For the most useful results, test your screen at its normal resolution and a comfortable brightness level. Avoid reflections and direct light that make small defects harder to see.
What Is a Dead Pixel?
A dead pixel is a pixel on a display that no longer functions correctly, often appearing as a tiny black dot against a white or bright background. A pixel is made up of red, green, and blue subpixels that combine to produce the colors you see on the screen.
When a pixel or its subpixels fail, the affected area may not display the intended color. Depending on the type of defect, you might notice a dark spot, a persistent colored dot, or a bright point that remains visible on different backgrounds.
Dead pixels can occur on LCD, LED-backlit LCD, OLED, and other types of displays. They may be difficult to notice when viewing photos, videos, or websites, but solid-color backgrounds make small irregularities easier to spot.
Dead Pixels vs. Stuck Pixels: What’s the Difference?
Dead pixels and stuck pixels can look similar, but they are not the same problem.
Dead pixels typically appear as small black dots because the affected pixel is no longer producing light as expected.
Stuck pixels occur when one or more subpixels remain stuck in a particular state. They may appear as red, green, blue, white, or another bright color that does not match the background.
Bright pixels are unusually illuminated points that can remain visible against darker backgrounds. Their exact appearance depends on the display technology and the type of pixel or subpixel defect.
Testing with several solid colors helps you understand what you are seeing. However, a browser-based test is a visual inspection tool, not an automated hardware diagnosis. A suspicious spot may also be caused by dirt, surface damage, or another display issue.
Which Colors Should You Use for a Dead Pixel Test?
Using different background colors makes it easier to identify pixels that behave differently from the surrounding screen.
- White: Helps reveal dark or black pixels that are difficult to notice on darker content.
- Black: Helps reveal bright or colored spots against a dark background.
- Red: Helps identify pixels or subpixels that do not display red correctly.
- Green: Helps reveal irregularities in the green subpixels.
- Blue: Helps reveal irregularities in the blue subpixels.
- Gray: Makes certain subtle defects and display uniformity problems easier to notice.
- Yellow, cyan, and magenta: Provide additional color combinations that can help reveal irregularities missed by the primary colors.
No single background reveals every possible display defect. Checking several colors gives you a more complete visual inspection than using only a white or black screen.
How to Test a Monitor or Laptop for Dead Pixels
Testing a desktop monitor or laptop screen is especially useful when buying a new device, replacing a display, or checking a screen that has developed a visible spot.
Start by opening the test in your browser and displaying each available color. Examine the entire panel, paying attention to areas where you have already noticed an unusual dot.
If you find a suspicious spot, switch to another color and check whether it stays in the same physical location. You can also compare the display with another image or application to help determine whether the issue is part of the displayed content or the screen itself.
For an external monitor, check the monitor’s built-in diagnostic feature if one is available. This can help distinguish a panel defect from an issue involving the computer, cable, or video signal.
If the display is new, keep a record of the affected area and check the seller’s return policy and the manufacturer’s pixel-defect warranty terms. Acceptable pixel defects and replacement policies vary by manufacturer and model.
Can You Fix a Dead Pixel?
A genuinely dead pixel is generally a hardware problem and cannot be reliably repaired with software. Whether the display can be repaired depends on the cause of the defect and the device’s construction.
A stuck pixel may sometimes recover when its subpixels begin responding normally again. Some pixel-fixing tools use changing colors in an attempt to resolve this type of issue, but results are not guaranteed, and these tools cannot reliably repair a dead pixel.
Before trying any repair method, identify the likely type of defect. Avoid pressing, rubbing, or applying pressure to the screen, as this may cause additional damage.
If the pixel defect affects a newly purchased device, contact the seller or manufacturer before attempting repairs. Unapproved repair methods could complicate a warranty claim.
Why Should You Test Your Screen for Dead Pixels?
A dead pixel test can be useful in several situations:
- Buying a new monitor: Check the panel soon after unboxing while your return window is still open.
- Purchasing a used laptop: Inspect the display before completing the transaction.
- Checking a gaming monitor: Look for distracting bright or dark spots that may be noticeable in games.
- Inspecting a smartphone or tablet: Check the display for visible pixel irregularities.
- Troubleshooting a display: Determine whether a suspicious spot remains visible across different backgrounds.
- Checking a repaired screen: Inspect the panel after a display replacement or repair.
Finding a defect early makes it easier to document the issue and determine your available options.
Frequently Asked Questions About Dead Pixel Tests
How do I test my monitor for dead pixels?
Open an online dead pixel test, display a series of solid colors, and inspect the entire screen for dots that do not match the background. White, black, red, green, and blue are particularly useful for identifying different pixel irregularities.
Is this dead pixel test free?
Yes. You can use the online color test on PixelConverter to inspect your display without purchasing dedicated testing software. Select a color or use fullscreen mode to examine your screen.
Can I test a laptop screen for dead pixels?
Yes. Open the test in your laptop’s browser and cycle through the available colors. Check the whole display, including the corners and edges, for persistent black, bright, or colored spots.
Can I check my phone or tablet for dead pixels?
Yes. You can open the test in a compatible mobile browser and inspect the display using solid-color backgrounds. The available fullscreen experience may vary depending on your device and browser.
Are dead pixels always black?
No. Dead pixels commonly appear black, but pixel defects can also appear as bright or colored spots. Their appearance depends on the affected pixel or subpixels and the display technology.
Can an online dead pixel test fix my screen?
No. This tool helps you visually identify possible pixel defects; it does not automatically repair the display. Some stuck pixels may respond to specialized color-cycling techniques, but a genuine hardware defect generally requires professional assessment or display replacement.
Is one dead pixel enough to replace a monitor?
It depends on the seller’s return policy, the manufacturer’s warranty, and the specific model. Some policies allow a certain number or type of pixel defects. Check the conditions that apply to your device before requesting a replacement.
How accurate is an online dead pixel test?
A solid-color test can make visible pixel irregularities easier to spot, but it cannot automatically confirm the cause of a defect. Lighting, dirt, reflections, display settings, and other hardware issues can affect what you see. Inspect suspicious areas under several colors and use the manufacturer’s diagnostic tools when available.
Check Your Screen Today
Use the free PixelConverter dead pixel test to inspect your monitor, laptop, phone, or tablet with multiple solid colors. A few minutes of visual testing can help you spot possible display defects, document suspicious areas, and decide whether further troubleshooting or a warranty check is needed.
Remember that the test is intended for visual inspection. It does not guarantee that every defect will be detected or that an identified problem can be repaired.