Screen Tearing Test
Check whether fast horizontal motion produces visible tears or broken lines on your display when frame rate and refresh rate are out of sync.
How to recognize tearing
Tearing appears as one or more horizontal breaks where parts of different frames are shown at the same time. It is often easiest to spot on fast moving vertical lines or scrolling motion.
Use this test while comparing V-Sync, G-Sync, FreeSync or frame-rate limit settings. A clean result usually means frame delivery is matching the display refresh more closely.
- A broken line or visible split across the image is a classic tearing sign.
- Tearing can change depending on frame rate, refresh rate and adaptive sync settings.
- Test both fullscreen and windowed modes if your setup behaves differently.
- On mobile devices, tap the screen once or twice to reveal controls and move between steps.
How to read the result
Use the focused test first, then confirm what you see on at least one or two additional steps. A single quick glance can be misleading on glossy panels, OLED screens or displays with strong reflections.
- Clean the panel surface before you decide that a defect is real.
- Check from your normal viewing distance first, then move closer.
- Retest with another related tool if the issue could also be caused by uniformity, sync or motion settings.
- If you are within the return window, take notes or photos while the issue is still easy to reproduce.
Related tests you should also try
Screen Tearing (V-Sync)
Watch for horizontal tears when a fast line moves across the screen.
UFO Ghosting & Overdrive
Track fast moving objects and look for trailing blur or inverse ghosting halos.
Response Time / Input Lag Demo
See how quickly the display reacts to a click or key press.
Gamma Calibration
Verify that your display stays close to a 2.2 gamma target.
Frequently asked questions
Screen tearing happens when the graphics output and monitor refresh are not synchronized, so parts of different frames appear on the screen at the same time.
V-Sync often reduces tearing, but it can also add latency or stutter in some situations. Adaptive sync options such as FreeSync or G-Sync may provide a better balance.
Higher refresh rates can reduce how obvious tearing looks, but they do not eliminate it if frame delivery still falls out of sync.
Yes. A browser-based tearing test is useful for a quick visual check before you fine-tune game settings and graphics driver options.
Run the test, then interpret the result
Screen tearing is usually a timing mismatch, not a physically cracked panel. It appears when portions of different frames reach the screen during one scan.
What screen tearing is
Screen tearing happens when different parts of the screen show different frames at the same time.
It usually appears as a horizontal split and becomes easier to notice during fast sideways motion.
- Tearing is different from stutter.
How to test it
Use a fast horizontal motion pattern or a game with strong lateral movement.
Test once with synchronization disabled and then compare with V-Sync, FreeSync, or G-Sync enabled.
- Repeat at the display’s intended refresh rate.
How to reduce it
Enable adaptive sync if supported.
If not, compare with V-Sync.
- An FPS cap can also improve consistency in some systems.
Treat FPS, refresh rate and synchronisation separately
FPS is the rate at which the GPU produces frames; Hz is the panel's refresh capacity. When a new frame arrives during a scan, portions of different frames can appear together as a horizontal split. VRR attempts to align refresh timing within its supported range, while V-Sync uses a different timing and buffering behaviour.
Compare settings in a fixed order
- Confirm that the expected refresh rate is selected in the operating system.
- Compare the same motion with V-Sync disabled and enabled.
- With VRR enabled, check whether the game remains inside the supported frame-rate range.
- After changing cable, port or resolution, verify the available refresh rates again.
A browser pattern cannot certify that the hardware is technically fault-free; it gives you controlled motion for comparing visible splits. A symptom limited to one game may also come from its display mode, frame limiter or rendering pipeline.
Keep the four jobs separate
| Term | Job | Common mistake |
|---|---|---|
| FPS | Frames produced by the GPU each second | Selecting 144 Hz does not make a game produce 144 FPS. |
| Hz | Display refresh capacity | A browser estimate is not proof of the operating-system setting. |
| V-Sync | Coordinates or buffers frame presentation | Its latency and smoothness trade-off is not identical on every system. |
| VRR | Adjusts refresh timing within a supported range | It may not cover behaviour outside that range. |
- Verify native resolution and refresh rate in the operating system.
- Compare the same motion with V-Sync off and on.
- Confirm that VRR is enabled in the monitor, driver and application where required.
- Change only the frame cap before comparing again.
- If one game is affected, compare exclusive fullscreen and borderless modes.
The VESA Adaptive-Sync compliance programme evaluates many criteria that a browser pattern cannot reproduce. This tool helps compare visible tearing; it does not certify VRR performance or measure latency.