Black Screen
Display a full black screen to check for stuck pixels, backlight bleed, screen uniformity, and OLED burn-in. Works on monitors, TVs, phones, and tablets.
How does this test work?
A black screen test fills your display with pure black to help you spot stuck pixels that glow in color, check for backlight bleed around edges, and test OLED burn-in. Use fullscreen mode in a dark room for best results.
How to use the Black Screen
Open the Black Screen on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
What can a black screen test reveal?+
A full black screen helps you spot stuck pixels (bright dots of color), backlight bleed (light leaking from edges on LCD panels), and screen uniformity issues like clouding or IPS glow.
Should I test in a dark room?+
Yes. A dark room makes it much easier to see backlight bleed, stuck pixels, and subtle uniformity problems that ambient light would hide.
Related Tests
Dead Pixel Test
Run a free dead pixel test in fullscreen. Check monitors, laptops, phones, tablets, and TVs for dead or stuck pixels using solid color screens.
White Screen
Display a full white screen to find dead pixels, check screen brightness uniformity, and clean your display. Works on all devices.
Backlight Bleed Test
Use a fullscreen black screen to check your monitor, laptop, or TV for backlight bleed, edge glow, clouding, and screen uniformity issues.
Screen Uniformity Test
Test your display for uniformity issues including clouding, dirty screen effect, tinting, and banding using gray and white test screens.