OLED Burn-In & Retention Tester
Detect dead and stuck pixels on monitors, laptops, and TVs. Measure true display refresh rate (60Hz, 120Hz, 144Hz, 240Hz) with zero software downloads.
🖥️ Display Dead Pixel & Monitor Refresh Rate (Hz)
Click the button below to enter Fullscreen Dead Pixel Mode. Click the screen to cycle through solid Black, White, Red, Green, and Blue screens to inspect for stuck or dead subpixels.
Understanding Display Refresh Rates & Unsticking Dead Pixels
Dead Pixels vs Stuck Pixels Explained
A dead pixel is a failed transistor that receives zero electrical signal—appearing permanently black on white backgrounds. A stuck pixel is a liquid crystal molecule frozen in an open optical state, appearing as a bright red, green, or blue dot on dark backgrounds. Rapid color flashing can often revive stuck subpixels by repeatedly exercising the transistor gates.
Why Verifying Monitor Refresh Rate (Hz) Matters
Many gamers purchase 144Hz or 240Hz monitors but unknowingly run them at 60Hz because Windows defaults to 60Hz over standard HDMI cables. Our tool uses hardware-accelerated requestAnimationFrame timing to measure your true physical screen refresh rate in real-time.