Free browser-based reflex game
Reaction Time Test Online
Test your reflex speed with a fast online reaction time game. Wait for the green signal, tap quickly, track your best score, compare recent results and share your reaction time challenge.
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Reaction Area
Click or tap the large area below. Do not react before it turns green.
Recent Results
Your last 10 reaction results are saved locally in this browser.
Reaction time tips
Stay relaxed
Tension can slow your response. Keep your finger ready but relaxed.
Avoid early clicks
Clicking before green invalidates the attempt and trains bad timing.
Use same device
Screen refresh rate, mouse, touch input and browser can affect results.
How to use this reaction time test
Start test
Click or tap Start Test to begin the reaction challenge.
Wait for green
Do not click early. Wait until the test area turns green.
React fast
Click or tap as soon as you see the green signal.
Check result
View reaction time, rank, best score, average and history.
Measure reflex speed
This test measures how quickly you respond after a visual signal. It is useful for quick practice, focus checks and fun challenges.
Track your best score
Your best reaction time and recent results are stored locally, so you can keep trying to beat your personal record.
Challenge friends
After each test, copy or share your score card and invite others to beat your reaction time.
Reaction time FAQ
Is this reaction time test free?
Yes. SmartTools Reaction Time Test is free to use online with no signup required.
How does the reaction time test work?
Wait until the screen turns green, then click or tap as quickly as possible. The tool measures the time between the green signal and your reaction.
What is a good reaction time?
For many users, under 250 ms is good, under 200 ms is fast, and under 170 ms is excellent. Results vary by device, screen, browser and input method.
Does this test save my scores?
Your best score and recent results are saved locally in your browser. They are cleared if you clear browser data.
Can I use this on mobile?
Yes. The reaction time test works with mouse clicks on desktop and taps on mobile devices.
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