What the tool does, how to run it, and what to expect from the result.
The browser draws once per screen refresh, so the time between frames gives the refresh rate: about 16.7 ms is 60 Hz, 6.9 ms is 144 Hz. The motion lanes below move the same block at full, half and quarter rate, so you can see what the extra frames buy. If a high-refresh screen reads 60 Hz, check the display settings, the cable (older HDMI caps at 60 Hz at high resolutions) and battery saver.
A quick way to understand who this helps, what it solves, and where it connects next.
Gamers, PC builders and anyone checking a device before a warranty claim.
Using the refresh rate test without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Windows often defaults to 60 Hz. Set it under Settings, System, Display, Advanced display. Use DisplayPort or HDMI 2.0+ and a cable rated for the bandwidth.
Background tabs, power saving and variable refresh rate (FreeSync, G-Sync, ProMotion) change the frame timing. Keep the page in front and wait a few seconds.
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Your screen’s refresh rate, measured live, and a motion test that shows what it looks like.
The browser draws once per screen refresh, so the frame interval reveals the rate. On a 120 Hz or 144 Hz screen, a lower number means the OS, battery saver or the cable is limiting it. The three lanes show the same motion at full, half and quarter rate.