ReactionTimeTestPro Verified
Measure your reaction time in milliseconds — free, no signup
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About this tool
ReactionTimeTestPro is a free online tool for measuring reaction speed in milliseconds across five modes: classic, F1 lights, sound, spacebar, and CPS. It compares your results against human benchmarks, tracks your history in-browser, and offers tips to improve your reflexes. No signup or paywall required.
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