Refresh Rate Test (Hz)
The browser draws one frame each time the screen refreshes, so timing those frames tells the refresh rate of your display. Use it to confirm that a new 144 Hz or 240 Hz monitor is really running at its full rate, and not stuck at 60 Hz because of a cable or a setting.
| Resolution (real pixels) | β |
|---|---|
| Resolution with scaling (CSS) | β |
| Pixel ratio (scaling) | β |
| Browser window | β |
| Available area (without taskbar) | β |
| Aspect ratio | β |
| Resolution name | β |
| Refresh rate | β |
| Color depth | β |
| Color gamut | β |
| HDR | β |
| Orientation | β |
| Touchscreen | β |
How to use it
- Open the page and wait two seconds without switching tabs.
- Read the rate at the top; the moving ball should look smooth.
- If it shows less than your monitor's maximum, check the display settings and the cable.
Frequently asked questions
My monitor is 144 Hz but the test shows 60 Hz. Why?
Usually the rate is set to 60 Hz in the system display settings, or the cable or port cannot carry more (older HDMI). Battery saver and some browsers also limit animations to 60 frames per second.
Does it work with several monitors?
It measures the monitor where this window is. Drag the window to the other screen and wait a moment to measure it.
Why is the measured value a little off, like 59.9 Hz?
Many screens run at 59.94 Hz or 119.88 Hz, and timing varies slightly from frame to frame. The test shows the measured value and rounds it to the nearest standard rate.
🖥️ What Is My Screen Resolution?
🖱️ Mouse Test
⏱️ Reaction Time Test
🔊 Decibel Meter
📏 Online Ruler (Actual Size)
🥁 Tap Tempo – BPM Counter
🖥️ Dead Pixel Test
🎹 Keyboard Test