Browser Hz Estimate and Frame Skipping Check
Animation cadence is estimated from requestAnimationFrame timestamps. It is not a direct measurement of the Hz configured in system display settings. Tab visibility, workload and power saving can change the result.
Live browser animation estimate
- Estimated animation cadence
- Measuring…
- Average frame time
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- Frame interval min–max range
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Note: Calculated from browser requestAnimationFrame timing. Background tabs, battery-saver modes, or disabled hardware acceleration may cap browser output at 60 Hz.
1/1 Full Hz vs. 1/2 Half Hz vs. 1/4 Quarter Hz live motion comparison
The three bars below move at the exact same speed across the screen at every browser animation callback, every second callback, and every fourth callback so you can visually compare motion clarity.
A photo may reveal gaps, but exposure and browser timing can affect the pattern; it is not a definitive panel diagnosis.
Why is my 144Hz or 240Hz monitor stuck at 60Hz?
- Operating System Display Settings: In Windows, open Settings → System → Display → Advanced display and select a supported rate for the correct display and resolution.
- Cable & Port Bandwidth: Check the supported modes of the computer output, monitor input and any adapter. Use the capacity estimate in our HDMI & DisplayPort Bandwidth Calculator.
- Browser Hardware Acceleration: Ensure graphics acceleration is enabled in your browser settings and battery saver is turned off.
Step-by-step troubleshooting
144, 165 or 240 Hz missing: a practical troubleshooting guide
Check the selected display, resolution and connection chain when a high refresh rate is missing. Separate the Windows display mode from a browser estimate.