About ReflexLab

ReflexLab is a free set of quick reflex tests: measure your reaction time in milliseconds, check your typing speed in WPM, and train your short-term memory. No sign-up — everything runs in your browser.

ReflexLab is part of a small fleet of single-purpose web toys: each one does one thing, loads instantly, and asks for nothing — no account, no download, no paywall. The fleet is supported by advertising so the toys stay free.