Screen Check, Gradients & Stuck Pixel Fixer
Check your display for defective pixels, backlight bleed, and color banding. Ensure your screen is clean before starting.
If you found a pixel stuck on a specific color (not black), this tool flashes rapid RGB colors to un-stick the crystal. Warning: Do not use if sensitive to flashing lights.
A Dead Pixel is permanently black (no power). A Stuck Pixel is frozen on Red, Green, or Blue. Stuck pixels can often be fixed; dead pixels usually cannot.
Drag the flashing square directly over the stuck pixel. Leave it running for 10 to 15 minutes. The rapid color changes force the liquid crystal to reset.
What we do
We utilize your browser's native Fullscreen API to hide your taskbar and browser UI, allowing you to test 100% of your monitor's surface area.
Cycles through pure White, pure Black, and pure RGB (Red, Green, Blue) to isolate sub-pixel defects, backlight bleed, and IPS glow.
Test your screen's contrast and sharpness using our Grayscale Gradient check (for color banding) and Checkerboard test.
Includes a safe, resizable, and draggable utility that flashes primary colors at 60Hz. This rapid state-change can un-jam frozen liquid crystals.
During the test, your mouse cursor is completely hidden so you don't mistake the tip of your cursor for a group of defective pixels.
Your privacy is our priority. This tool runs entirely Client-Side in your browser. No data is collected, and no software installation is required.