A LITTLE BREAK
Free. No account needed.Reaction test
Wait for green, then see how quickly you can respond.
Getting the game ready…
How to play
- Start a round and wait for the panel to turn green.
- Click, tap, or use Enter/Space as soon as it says “Go!”. Clicking early restarts that trial.
- Complete five trials to see your average and best response.
An informal game. Screen refresh, browser scheduling, and input hardware affect the measured time.
How it works
- Start a round and wait for the panel to turn green.
- Click, tap, or use Enter/Space as soon as it says “Go!”. Clicking early restarts that trial.
- Complete five trials to see your average and best response.
Example & practical use
A response 0.25 seconds after green is displayed as 250 ms.
What to know
An informal game. Screen refresh, browser scheduling, and input hardware affect the measured time.
Are my files or inputs uploaded?
Image and text processing happens in your browser. Your files are not uploaded to our servers.
Found an issue?
We are improving this alpha release. Tell us the tool, your device and the expected result through the contact page. You do not need to share private inputs or original files. Contact