ReactionTimeTest Pro

About ReactionTimeTest Pro

ReactionTimeTest Pro is a free browser-based tool for measuring how quickly you respond to a visual or audio signal. It is aimed at gamers, athletes, students and anyone curious about their reflexes who wants a quick result without creating an account.

The site offers several test formats: a classic five-attempt test with best and average scores, an F1-style lights-out start, a sound-triggered beep test, a spacebar-only version and a clicks-per-second test. Results are shown in milliseconds and compared against published benchmark levels, so you can see where you fall from elite down to training needed.

Scores are saved in your browser so you can track progress over time, and you can download a shareable score card. The site also explains how the test works, what affects reaction time such as hardware delay and sleep, and includes a ruler drop method for comparing people without screens.