Double Click Test is a free, no-install set of browser mouse tools. The main test logs every press of one mouse button (left, right, wheel, back or forward), measures the gap with performance.now(), and flags intervals below an adjustable 20-200 ms threshold as candidate repeat signals, with CSV export. The site also has a click speed (CPS) test, click counter, jitter, kohi, butterfly and drag click tests, a mouse button test, right-click test, scroll test, and a step-by-step guide to fixing mouse double-click problems. No sign-up, not AI.
Most online double-click testers just show a scary 'your mouse is broken' message after one fast click. I wanted a tool that shows the raw press log and gaps, is clear that a flagged interval is only a signal to retest, and then points to practical troubleshooting steps.