Input Lab Display & touch

Monitor Hz Test

Estimate monitor refresh rate in the browser with requestAnimationFrame sampling, median Hz, frame time, jitter and a motion track for spotting uneven presentation.

Runs locally No account Repeat freely
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Touch Screen TestCheck touch points, multi-touch capacity and screen coverage. Screen Resolution TestSee screen, viewport, DPR, orientation and color depth. Dead Pixel TestInspect the full screen for stuck, dead or discolored pixels. Tap Speed TestMeasure taps per second or use the unlimited touch counter.
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Monitor Hz Test Guide

How to use the monitor hz test

Keep the tab visible and start a fresh sample after moving the window to the monitor you want to check. The test collects browser animation frame timestamps for several seconds.

Understanding the results

Median Hz is the most stable estimate; frame time is the milliseconds between presented callbacks. Jitter and missed-frame counts highlight uneven delivery.

What this browser tool can measure

This measures animation frames observed by the browser, not the panel electronics directly. Power saving, background throttling, compositor load and variable refresh can change the result.

Private by design

The interactive work happens locally in this browser. No account is required, and test inputs are not sent away to calculate the result.