Browser reaction game
How quickly can you react?
Wait for the panel to turn green, then respond. Five short rounds give you a simple local benchmark for your visual response time.
Reflex Check
Use a mouse, touch screen, or Space/Enter key.
The timer starts after the panel changes. Do not click while it says “Wait”.
Start a five-round test when you are ready.
Your result
What the number means
This is a browser benchmark
A response time here is affected by your display refresh rate, browser scheduling, device input latency, and whether you use a mouse, keyboard, or touch screen. Treat it as a repeatable personal challenge, not a medical or scientific assessment.
How the score is summarized
The page shows the average, median, and fastest valid response from five rounds. An early response does not count as a valid time and restarts the same round.
Are my results saved?
No. Measurements stay in memory for this page session. There is no account, leaderboard, score request, or cloud history.
How should I compare reaction time results?
Start the test and respond when the visual signal changes. Repeat it and compare attempts made on the same device and input method.
Worked example
Compare several attempts under the same conditions instead of directly comparing a mouse result with a phone touchscreen result.
Limits to know
Display and input latency are included. This is not a medical test, driving fitness assessment, or precise comparison of people’s abilities.