Have you ever noticed a tiny dot on your screen that won’t go away? That’s likely a dead pixel or a stuck pixel—a common issue with LCD, LED, and OLED displays. Fortunately, there’s a simple way to test your screen: using a fullscreen black screen tool.
What Are Dead and Stuck Pixels?
Dead pixels are pixels that remain the permanently off, appearing black dot. Stuck pixels may stay red, blue, green, and white due to transistor malfunction. While not always noticeable, they can be distracting—especially on high-resolution or color-sensitive displays.
Why Use a Black Screen to Detect Them?
A solid black background makes the bright stuck pixels instantly visible. When your screen is fully black, any pixel that stays illuminated (blue, red, or green) will stand out clearly—making this one of the most effective pixel testing methods available.
Use Blackscreen.space for Quick Detection
Blackscreen.space is a free online tool that turns your entire screen pitch black. It’s:
- 100% fullscreen (no ads or UI elements)
- Instant to use—just visit and tap/click
- Perfect for detecting stuck or abnormal pixels
How to Perform the Test
- Open Blackscreen.space
- Maximize it to full screen (F11 on most browsers)
- Turn off all lights in the room
- Slowly scan your screen from corner to corner
If you notice bright dots that don’t disappear, they’re likely stuck pixels. Darker spots that remain black could be dead pixels.
What to Do If You Find One
Some stuck pixels can be fixed using flashing color sequences or gentle pressure (with caution). However, dead pixels are usually permanent. Most manufacturers will replace screens with multiple dead pixels under warranty—so early detection is key.
Additional Pixel Testing Tools
Pair your black screen test with other tools:
- WhiteScreen.dev – to check dark/dead pixels on a bright background
- Red, Green, and Blue screens – for full RGB pixel check
Final Tip
Before buying or returning a display, always perform a fullscreen pixel check. It only takes seconds—and Blackscreen.space makes it effortless.
