Monitor frame timing check
Frame Skipping Test for checking monitor frame skips online.
Run a camera-assisted frame skipping test to check monitor frame skips, uneven refresh, and display timing problems online. The tool provides a moving marker pattern that is designed to be photographed and inspected for missing or uneven gaps.
Method
How this frame skipping test works
The tool displays a moving marker pattern. When the display is refreshing normally and the camera capture is clean, the markers should appear with even spacing in a photo.
If the monitor skips frames, the captured pattern may show missing markers or uneven gaps. This is why frame skipping tests are best treated as camera-assisted visual checks, especially at high refresh rates.
Browser animation timing, camera shutter behavior, VRR settings, power mode, and OS refresh-rate settings can affect the capture. Use this test as a practical diagnostic signal, not a lab-grade measurement.
Cleaner capture
Use a stable setup before judging the result
Set your monitor to the refresh rate you want to test.
Use fullscreen mode before taking a camera photo.
Keep the browser tab focused while the pattern is running.
Disable battery saver or low-power mode.
Try more than one speed and contrast mode.
Repeat the photo if the camera shutter created uneven bands.
Interpretation
What the camera photo can show
Even marker spacing usually means the visible refresh sequence is consistent for that capture. Missing markers, doubled gaps, or repeated uneven spacing can point to frame skipping or unstable display timing.
A bad photo does not always prove a monitor defect. Camera shutter timing, variable refresh rate behavior, browser scheduling, and system load can also create uneven captures. Confirm by repeating the test and comparing display modes.
Related Tools
Display performance tools in the suite
FAQ
Frame Skipping Test Questions
What does this frame skipping test check?
It provides a moving marker pattern designed for camera-assisted frame skipping checks. A photo of the moving pattern can reveal missing or uneven marker gaps when a display skips frames.
Can the browser automatically detect skipped monitor frames?
Not reliably. Browser timing can show animation consistency, but the most useful frame skipping check is camera-assisted because the camera captures what the display actually shows.
How do I run the test correctly?
Set the display to the refresh rate you want to test, run the moving pattern, use fullscreen if needed, then take a camera photo of the moving markers. Look for missing or uneven gaps.
What can cause an uneven photo?
Uneven gaps can come from monitor frame skipping, browser timing instability, camera shutter mismatch, VRR behavior, power saving, or an incorrect display refresh-rate setting.