Display

Browser refresh-rate observation

After Start, estimate Hz from browser frame timing.

Getting the controls ready…Still loading. Check your connection, then reload the page.

Choose a color, inspect the panel, then confirm only what you saw yourself.

Values come from requestAnimationFrame browser observation — not certified panel refresh rate.

Median (Hz, observation): —

Min: — · Max: — · Variation (Hz, observation): —

Samples: 0

Not started

Visual confirmation only — not automatic dead-pixel detection or certification.

Details and limits

Shows median and variation from requestAnimationFrame samples. Not a certified panel refresh-rate measurement.

How to check

Press Start, wait a few seconds, then read the median and variation. Stop ends sampling.

If something feels wrong

If the number looks low, close other tabs, check fullscreen and power settings, then observe again.

Limits

Focus, power saving, browser limits, and variable refresh affect the value. It may differ from OSD or EDID numbers.

Test methods and limitations
FAQ

My monitor is 144 Hz but this shows about 60.

Browser observation can sit below panel settings. It is not a proof of the official spec.

The value keeps moving.

Variation is expected. Use it with the median as a reference only.