Observe the blue block. Smoother motion indicates higher Hz.
Expert Monitor Refresh Rate Test
This high-precision tool uses the browser's GPU-accelerated engine to measure the exact frequency at which your display is refreshed. It is an accurate way to verify your Windows or Mac display settings without installing software.
How are we measuring your Hz?
Our engine leverages requestAnimationFrame, a native web API that syncs with your monitor's vertical vertical refresh. By calculating the exact microsecond delta between these frames, we can provide a live readout of your actual hardware performance. If our counter shows 60Hz but you have a 144Hz monitor, your OS or browser may be capping your output.
What is Frame Skipping?
Frame skipping happens when the monitor "drops" a visual update from the GPU. This is common in overclocked monitors or low-quality display cables (HDMI 1.4 vs 2.1). If your "Stutter Rating" shows red while moving a window rapidly, you might be experiencing hardware-level frame loss.
Testing Motion Blur & Ghosting
Use our blue "Ghosting Bar" to check pixel response time. If you see a "trail" or "shadow" following the bar, your panel has slower pixel transitions. This is common in VA panels and older IPS displays. High-end OLED and TN panels will show almost zero trailing at 240Hz+.
Hardware Troubleshooting Guide
Check Your Cable
Ensure you are using a DisplayPort 1.4 or HDMI 2.1 cable for high-refresh 4K gaming. Older cables often bottleneck your Hz to 60 or 30.
GPU Control Panel
On Windows, right-click Desktop > Display Settings > Advanced Display. Make sure the "Refresh Rate" dropdown is set to the highest possible value for your specific model.
Browser Hardware Acceleration
If your results are capped at 60Hz despite having a fast monitor, check your browser settings (Chrome/Edge/Firefox) and ensure "Hardware Acceleration" is toggled ON. Without this, the browser cannot sync with your modern GPU.