Press Start test — a beam sweeps across so you can see how smooth your refresh rate looks.
FPS historylive FPS · target line
Motion:
Detected refresh rate
--Hz
Ready to test
Live FPS
--
Frame time
-- ms
Target frame time
-- ms
Confidence
--%
Min FPS
--
Avg FPS
--
Max FPS
--
Jitter
-- ms
Dropped frames
0
Frames / time
0 · 0.0s
Stability—
Target:
Important notes & browser limitations
Run it in Chrome or Edge. Some browsers cap a windowed tab at 60fps. If you have a high-refresh display but see 60Hz here, switch browser or use the fullscreen test.
Use fullscreen for the most accurate reading. Fullscreen removes the 60fps windowed cap in some browsers and lowers jitter by cutting UI overhead.
Close other apps and keep this tab focused. Background tabs are throttled and heavy apps add dropped frames.
Multi-monitor: the result reflects the screen this browser window is on. Drag the window to another monitor and re-test to check each display.
VRR (G-Sync / FreeSync): a variable refresh rate display can show higher jitter and a fluctuating FPS even when working correctly.
This test runs entirely in your browser. No data is collected.