Play Free Online Reaction Time Tester – How Fast Are You?

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Think you're fast? Put your reflexes to the test with our free online Reaction Time Tester! Click as soon as the screen changes and see how quick you really are. Great for a brain break or daily focus boost — try it now on Zentroll.com!

🎯 Trivia

The average human reaction time is around 250 milliseconds — that’s faster than the blink of an eye! Athletes and gamers often train to improve reaction speed, and tests like these are even used in scientific research on cognitive performance.

🕹️ How to Play

• Wait until the screen changes color or displays "CLICK!"
• Tap or click as quickly as possible when it happens.
• Your reaction time will be shown in milliseconds.
• Try again to beat your best time — and share it with friends!

⏱️ Play Free Online Reaction Time Tester – Challenge Your Reflexes!

Wait for the box to turn green, then click or press Space as fast as you can!

Click to Start

Session Score: 0

Your Time: -- ms

Session Best: -- ms | Session Avg: -- ms

Overall Best: -- ms | Overall Avg: -- ms

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