Everyday tool
Reaction Time Test
Start a round and click only when the signal changes. Early clicks are marked as false starts.
Runs in your browser. No upload.
Start a round. Wait until the panel turns green, then click once.
Five valid rounds are used for the median.
About this tool
Reaction Time Test made simple.
The result includes screen, browser, input-device and scheduling delay. It is a casual test, not a medical or professional performance assessment.
Common questions
About Reaction Time Test.
How do I use Reaction time test?
Start a round and click only when the signal changes. Early clicks are marked as false starts.
Is my data uploaded to a server?
No. This tool runs locally in your browser. Your input is not uploaded.