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.
How does this test work?
A dead pixel test displays solid colors in fullscreen so you can spot pixels that stay black, white, red, green, or blue when they should change. It works on monitors, laptops, phones, tablets, and TVs through your browser without installing software.
How to use the Dead Pixel Test
Open the Dead Pixel Test 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 is a dead pixel?+
A dead pixel is a pixel on your screen that no longer lights up, appearing as a permanent black dot regardless of what the screen displays.
What is the difference between a dead pixel and a stuck pixel?+
A dead pixel stays black because it receives no power. A stuck pixel is frozen on one color (red, green, or blue) because one or more sub-pixels are stuck in the on position.
Can dead pixels be fixed?+
Dead pixels are usually permanent. Stuck pixels can sometimes be fixed by rapidly cycling colors, applying gentle pressure, or using pixel-fixing tools. If the issue persists, contact the manufacturer about warranty coverage.
How often should I test my screen for dead pixels?+
Test when you first buy a new monitor, laptop, phone, or TV. Also test if you notice unusual dots or color issues during normal use.
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