Guided screen tool

Refresh Rate Test - Check Browser Frame Cadence

Estimate the cadence delivered to this visible browser tab and review median frame time, p95 frame time, long intervals, and confidence.

This tool runs locally in your browser. Your marks, observations, and timing samples are not uploaded.

  1. Prepare
  2. Measure
  3. Review result

10-second browser cadence measurement

The test uses animation frame timestamps in the active tab. It does not need a fast-moving visual demo.

10-second measurement

Ready to measure this browser tab

Move this window to the display you want to check, keep the tab visible, and pause unusually heavy background work if possible.

How to read the result

Estimated Hz is based on the median time between browser animation callbacks. The p95 interval shows slower moments, while long intervals highlight callbacks that took much longer than the typical frame.

What this test cannot prove

This test cannot certify panel scanout, variable refresh range, input lag, response time, or frame skipping. A value near 60 Hz can come from display settings, browser behavior, power saving, or the current display path.

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