Motion Blur & Frame Skip Test
Moves an object across the full screen at a steady speed so you can judge ghosting trails and motion blur by eye. At the same time it logs requestAnimationFrame timing and counts skipped frames. To find out the refresh rate itself, use the Refresh Rate Test; for stuck pixels, try the Dead Pixel Test.
🔒 Runs in your browser · Your data is never sent to a server
Photosensitivity and comfort warning
The test shows fast-moving objects and strong light/dark contrast. Do not use it if you have a history of photosensitive seizures or tend to feel unwell from motion. If you feel uncomfortable, stop at once with the Esc key or the close button and take a break.
Speed
Background
Direction
Switches to full screen. Press Esc or the x at the top right to finish, the up/down keys to change speed, and Space to pause.
Latest result
No test has been run yet.
| Verdict | - |
| Frames analyzed | - |
| Estimated refresh rate | - |
| Skipped frames (estimated) | - |
| Skip events | - |
| Longest skip in a row | - |
| Share of skipped frames | - |
| Movement per frame | - |
Up/Down: speed / Space: pause / Esc: end
How to use
- Choose the speed, background and direction.
- Press "Start test" and an object moves across the full screen.
- Look for ghosting trails behind the object, blur and stutter.
- Press Esc to finish and see the estimated skipped frames.
Notes
- Skipped frames are estimated from browser paint timing. This does not measure the panel response time (GtG) or input lag.
- Ghosting and blur are judged by eye. Comparing two screens under the same settings makes differences easier to see.
- Load from other tabs or apps, power-saving modes and screen recording can add skipped frames and make the result look worse.
- Gaps longer than about 250 ms, such as when painting stops in the background, are left out of the statistics.
- This is a general-purpose display check and is not affiliated with any particular product or service.
Glossary
Ghosting
A faint trail left behind a moving object. It is most visible when the LCD panel responds slowly.
Motion blur
Blurred edges on moving objects. It comes from panel response and from how the eye tracks motion, so higher refresh rates reduce it.
Skipped frame (frame drop)
A frame that was not drawn in time, so one or more updates are missed and the next one appears late. It makes motion look jerky.
FAQ
Do skipped frames mean my monitor is faulty?
Usually not; they come from browser or PC load. Close other tabs and apps, turn off power-saving mode and test again. If they still happen often, check your GPU driver and hardware acceleration settings.
Does ghosting look different at different speeds?
Yes. Faster speeds move the object further each frame, so trails and blur stand out more. Slow speeds hide differences, so compare panels at Fast or above. Switching the background between black, gray and white also shows how the panel responds at different tones.
Does this test tell me my monitor response time in ms?
No. It is a quick visual check where you compare how long the trails look. It cannot replace the equipment used to measure GtG response time or input lag.
How does 60Hz look different from 120Hz here?
At the same speed, 120Hz halves the distance moved per frame, so motion looks smoother with less blur. You can compare the "Movement per frame" value shown on screen.
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