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Motion & Timing

Screen Tearing Test

Fast scrolling bars that reveal tearing without V-Sync/VRR.

▶ Start full-screen testVertical bars (→)← / → or tap the sides to switch · Esc to exit

How to use

  1. 1Click Start and watch the moving bars.
  2. 2Use ← / → to switch between vertical bars (reveals horizontal tears) and horizontal bars (reveals vertical tears).
  3. 3A clean image means no tearing; a break where the bars misalign is a tear.
  4. 4Toggle V-Sync or adaptive sync (G-Sync/FreeSync) and compare.
  5. 5Press Esc to exit.

FAQ

How do I stop tearing?

Enable adaptive sync (G-Sync/FreeSync) for tear-free, low-lag motion, or V-Sync to cap frames to the refresh rate (adds some lag). See our screen tearing guide for the full breakdown.

Why don't I see any tearing here?

Browsers usually draw in sync with the display, so a clean result is common and doesn't prove your games won't tear. Games tear when they send frames with V-Sync off. If you do see tears here, check that hardware acceleration is on in your browser and that the display is running at its rated refresh rate.

What does the speed slider change?

How fast the bars move. Faster motion makes the offset at a tear wider and easier to spot. If motion looks jerky rather than torn, frames are being skipped or repeated; the Frame Skipping Test checks for that directly.

Tips

  • Use the vertical-bars frame for horizontal tears and the horizontal-bars frame for vertical tears.
  • Toggle V-Sync or adaptive sync (G-Sync/FreeSync) and watch the tear line appear or vanish.

Related tests

Refresh RateMeasure your real refresh rate and watch a moving reference.Open test→Ghosting TestMoving boxes at selectable speeds to reveal ghosting and trails.Open test→Frame Skipping TestOne cell per frame — photograph it to catch a screen that drops frames.Open test→

Related guides

Learn more about what this test reveals and how to act on the results.

Screen Tearing, V-Sync, G-Sync, and FreeSync ExplainedWhy a frame splits across your screen mid-motion, and which sync technology — V-Sync, G-Sync or FreeSync — fixes it without adding input lag.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.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.Response Time vs Input Lag: They're Not the SameOne is how fast pixels change; the other is how long until your click reaches the screen. Both affect how a display feels, in different ways.