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Record the delay between a browser color change and your click or key press.
Press SPACE or click
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Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.
SPACE or Click
Mouse and touch input also work.
Metric
milliseconds (ms)
Difficulty
Easy
Use the same device and similar conditions when comparing runs. Your saved personal best and repeated results show your own trend; public leaderboard entries provide current competition context, not a population benchmark.
The browser-recorded interval between a visual color change and your click or SPACE-key response.
Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.
The result provides a repeatable response-time reading for this task. Browser, display, device, and input latency also affect it.
Reaction Time | Free Online Cognitive Test by BrainRivals