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Motion & Timing

Ghosting & Response Time Test

Moving boxes at selectable speeds to reveal ghosting and trails.

How to use

  1. 1Click Start and watch the boxes move across the screen.
  2. 2Use ← / → to change the speed.
  3. 3Look for a faint trail (ghosting) or a bright fringe (overshoot) behind each box.
  4. 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

Refresh RateMeasure your real refresh rate and watch a moving reference.Screen Tearing TestFast scrolling bars that reveal tearing without V-Sync/VRR.

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 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.What Is Ghosting and How Do You Fix It?Trails behind moving objects come from slow pixels — and the cure (overdrive) can overshoot. Here's the balance.Response Time vs Input Lag: They're Not the SameOne is how fast pixels change; the other is how long until your click appears. Both affect feel — differently.