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Reaction Time Test
reaction time · reflex · game · test · leaderboard
When the box turns green, click as fast as you can. Average is ~200–300 ms.
🏆 Leaderboard
No scores yet — be the first!
Lower is better. Casual leaderboard — for fun only.
How to use
- 1
Press start to begin.
- 2
Play and do your best.
- 3
See your score and try to beat it.
FAQ
Is this tool free?
Yes — no sign-up, no installation, completely free to use right away.
What is this tool?
This tool measures how fast you react — click the moment the screen turns green. It shows your time in milliseconds and lets you challenge the leaderboard. It's a fun, addictive test that runs in your browser.
What is a good reaction time?
Around 200–300 ms is typical; under 200 ms is fast.