All Tests
Every monitor and mouse test on JS Tests — all free, no signup, and running entirely in your browser.
Frame Rate Tester
Measure your live FPS
Measure how many frames per second your browser is actually rendering in real time, with a live graph and min/avg/max readout.
Open testRefresh Rate Tester
Detect your display Hz
Detect your monitor's true refresh rate (60Hz, 120Hz, 144Hz, 240Hz…) directly in the browser using the animation frame clock.
Open testMouse Polling Rate Tester
Check your mouse Hz
Move your mouse to measure its polling rate in hertz — how often it reports its position to your computer.
Open testInput Lag Tester
Time your reaction
Test the combined latency of your display, input device, and reaction time with a simple click-on-change test.
Open test