🎮 Browser Game
Reaction Time Tester
How fast are your reflexes? Click when it turns green.
Best Average: -- ms
Click to Start
Wait for green, then click as fast as you can!
How to play
Click the box to begin. Wait for it to turn green, then click or tap as quickly as you can. The timer measures your reaction time in milliseconds. Complete 5 attempts to see your average. Don't click too early — false starts will be caught!
Frequently Asked Questions
How does the Reaction Time Tester work?
Wait for the screen to turn green, then click or tap as fast as you can. The game measures how many milliseconds it takes you to react after the color change. Complete 5 attempts to see your average reaction time.
What is a good reaction time?
Average human reaction time is around 250 milliseconds. Athletes and gamers often have faster times (200ms or less). Times under 150ms are exceptional and usually indicate either extensive training or anticipation rather than pure reaction.
Can I cheat by clicking before the screen turns green?
If you click too early (before the screen turns green), the game will detect it as a false start and show an error. You must wait for the green signal before clicking.
How many attempts should I do?
The game tracks your last 5 attempts and shows your average. More attempts give you a better sense of your typical reaction time. Keep trying to improve your score!
Is my reaction time saved?
Your best average reaction time is saved in your browser's local storage so you can track your improvement over time. Nothing is uploaded to any server.
Does this work on mobile?
Yes! The Reaction Time Tester works on both desktop and mobile devices. Tap the screen instead of clicking, and the timer works the same way.