Mini-Games
Reaction Time Tester
Test and train your visual reaction speed down to the millisecond.
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Click to Start
When the red screen turns green, click as fast as you can.
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How It Works
Human reaction time typically averages between 200ms and 250ms for visual stimuli. Professional esports players and Formula 1 drivers frequently register scores between 150ms and 180ms.
This test uses sub-millisecond precision via the performance.now() browser API to measure your exact reflex timing.
Privacy Guarantee
Your data never leaves your browser. All computations run locally using modern JavaScript algorithms and native Web APIs.
- Zero uploads to external cloud databases
- No invasive trackers or third-party cookies
- Instantly cleared when you close the browser tab