Reaction Time Challenge
Try this free online reflex challenge and see how fast your eyes and mind really are! Measure your lightning-quick response in milliseconds, test your visual reflexes, and train yourself to react even faster.
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Click to start test and see your level
Reaction time refers to how quickly you respond after seeing a visual cue. Fast reactions are vital for safe driving, athletic success, gaming precision, and quick decision - making in daily life.
When the screen turns green, click as fast as possible. The system records the exact time between the signal display and your click to calculate your response speed.
Measuring reaction speed helps you understand how efficiently your nervous system processes information. It’s a great indicator for improving focus, reflexes, and coordination in sports, driving, and gaming.
Click the“ Start Test” button.The screen will turn red to preparefor the signal.
The moment the color changes from red to green, tap or click the screen immediately.
1. Press Start → 2. Wait for green → 3. React quickly → 4. View your score.
After your click, your reaction time will appear instantly in milliseconds.
Built with advanced algorithms that measure reactions down to the millisecond, guaranteeing consistent and trustworthy data.
Start with a single click — the clean, user-friendly design makes it effortless for anyone to try.
Fully responsive across computers, tablets, and smartphones, supporting both touch and keyboard input.
Yes, it’s available in English, Chinese, and Japanese to serve users worldwide.
The test relies on visual stimulus–response mechanisms validated by standard psychological experiments.
No registration required — simply visit the page and begin testing right away.