How the reaction time test works
Click or tap the test area to begin. The page waits for a random delay, turns green, and then measures how many milliseconds pass before your next click or tap. A lower number means a faster reaction in that attempt.
Free reflex test
Reaction Time Tester
Wait for the screen to turn green, then click or tap as fast as you can. Track your latest, best, average, and consistency across a short round.
- Millisecond timing
- Mouse or touch
- Best score saved
- Attempt history
- Copyable result
Reflex test
Wait for green, then click
False starts do not count. Your best score is saved in this browser only.
Reflex result
Current round
Waiting for first attempt
0 ms
- Latest reaction
- 0 ms
- Round best
- 0 ms
- Round average
- 0 ms
- Browser best
- No best yet
- Attempts
- 0 / 5
- Consistency
- Waiting
- Status
- Ready
Recent attempts
- No attempts yet.
What is a good reaction time?
Reaction time varies by device, input method, attention, sleep, and browser latency. Many casual browser tests land somewhere around the low-to-mid hundreds of milliseconds, but the fairest comparison is against your own attempts using the same device.
How to compare scores fairly
Use the same mouse, touchscreen, browser, and round length when comparing scores. Trackpad taps, phone screens, gaming mice, and high-refresh displays can all feel different. This tester is meant for quick fun and consistency practice, not laboratory measurement.
Why false starts matter
If you click before the green signal, the attempt is marked as a false start and does not count. That keeps the game honest: the goal is to react to the signal, not guess when it will appear.
Tips for better attempts
Relax your hand, keep your eyes on the test area, and avoid tensing up during the waiting phase. Short rounds are usually better than long sessions because fatigue and anticipation can skew the result.