About this test
When the screen turns GREEN, click as fast as you can. Wait through the red — clicking too early counts as a false start.
5 trials, average reaction time in milliseconds.
Frequently asked questions
How long does this test take?
About 2 min — 10–15 questions, no signup.
Is this test free?
Yes, completely free. No signup, no email collection, no paywall — just take it.
How accurate is it?
Reaction time varies based on rest, screen quality, and how warmed up you are. This is for fun, not medical assessment.
Can I share my result?
Yes. Take a screenshot of your result or send the test link to a friend. Results stay in your browser only.
Will my answers be saved?
No. Nothing is saved or sent anywhere — results live only in your current browser session and disappear when you close the tab.