Black Screen Tool
Free online black screen tool for testing dead pixels, cleaning your monitor, and OLED power saving. Works instantly in your browser with true black (#000000) color.
How to Use
- 1.Click the black rectangle above or press 'F' to enter fullscreen mode
- 2.Look carefully for any bright spots or colored pixels (these are dead/stuck pixels)
- 3.Press 'Escape' or click to exit fullscreen when finished
Use Cases
- •Dead Pixel Detection: Any visible bright spot on pure black indicates a dead or stuck pixel
- •Screen Cleaning: Pure black background makes dust and smudges highly visible
- •OLED Power Saving: True black pixels consume zero power on OLED displays
- •Monitor Testing: Essential tool when buying or testing new displays
Frequently Asked Questions
What is a black screen test?
A black screen test displays pure black (#000000) across your entire screen to detect dead pixels, stuck pixels, backlight bleeding, and screen uniformity issues.
How do I fix a black screen on my computer?
If your computer screen is stuck black, try: force restart, check power connections, update display drivers, boot in safe mode, or connect to external monitor. For device-specific fixes, see our troubleshooting guide.
Is this tool free?
Yes! 100% free, no download required, no signup needed. Works instantly in your browser on any device.
Does it work on mobile phones?
Yes, it works perfectly on iPhone, Android, tablets, and all mobile devices. Tap the screen to enter fullscreen.
What should I look for during the test?
Look for any bright spots, colored dots, or light bleeding around the edges. A perfect screen should show completely uniform black with no visible pixels.