Motion & Timing
Ghosting & Response Time Test
Moving boxes at selectable speeds to reveal ghosting and trails.
How to use
- 1Click Start and watch the boxes move across the screen.
- 2Use ← / → to change the speed.
- 3Look for a faint trail (ghosting) or a bright fringe (overshoot) behind each box.
- 4Press Esc to exit.
FAQ
What is ghosting?
Ghosting is a smeared trail behind moving objects caused by slow pixel response. Raising your monitor's overdrive can reduce it, but too much causes inverse-ghosting (overshoot).
Tips
- Track a moving box with your eyes, then try staring at a fixed point — each reveals different artifacts.
- If you see a bright fringe instead of a smeared trail, your overdrive is too high (overshoot) — turn it down a notch.
Related tests
Related guides
Learn more about what this test reveals and how to act on the results.
The Complete New-Device Screen Test ChecklistA 10-minute routine to inspect any new laptop, monitor, phone, or TV for dead pixels, bleed and tint before the return window closes.How to Test a Monitor Before (and Right After) BuyingWhat to check in the store and at home so you don't keep a monitor with dead pixels, bleed, or the wrong refresh rate.Refresh Rate Explained: 60 vs 120 vs 144 vs 240HzWhat Hz actually means, where the jump from 60 to 144 is most noticeable, and how to confirm your screen runs at the rate you paid for.What Is Ghosting and How Do You Fix It?Trails behind moving objects come from slow pixels — and the cure, overdrive, can overshoot into inverse ghosting. Here's how to balance it.