Refresh rate estimate
Measure browser animation cadence over an eight-second sample.
Keep this tab visible, stop other heavy tasks, and run the measurement on the display you want to check.
Enable JavaScript to run this interactive test. The guide and methodology below remain available.
How to run this check
Keep this tab visible, stop other heavy tasks, and run the measurement on the display you want to check.
Understand the result
PASS describes a received signal or your recorded observation. WARNING calls for another check. USER REVIEW REQUIRED means a measurement alone cannot decide. An unavailable API or denied permission does not establish hardware failure.
What this cannot tell you
requestAnimationFrame estimates presentation cadence. It does not read the physical panel specification.
If something seems wrong
Check the operating system refresh setting, cable limits, power mode and display selection.
Find troubleshooting help →Good to know
Is anything uploaded?
Raw diagnostic input and media are processed locally. Results remain in this page’s memory until you download a report or leave. Hosting requests still reach the site host. See the privacy policy.
Does a pass guarantee my hardware is healthy?
No. It records behavior observed in this browser session. Intermittent faults, internal components and operating-system restrictions need further investigation. See our methodology.