Reaction Time Test
A five-round tap test when the screen turns green
5回測定のライトチェック
反射神経テスト
赤い画面で待ち、緑になった瞬間にクリックまたはタップします。5回分の平均と最速を表示します。
0 / 5 回
フライングした場合は、その回をやり直します。
About Reaction Time Test
Reaction Time Test is a browser-based free tool that measures five attempts after the screen changes from red to green. It summarizes your average time, best time, S/A/B/C/D rank, and a short comment, making it useful as a quick focus warmup or a light game during breaks.
Everything runs in your browser with no upload or account registration. The waiting time changes randomly on each round, so you need to watch the screen carefully before responding. If you tap before the screen turns green, the attempt is treated as a false start and that round is retried.
Results can vary depending on your mouse, touchscreen, device performance, browser, display refresh rate, physical condition, and posture. This tool is a game-like simple check, not a medical measurement, aptitude test, or professional evaluation. Use it for casual self-checks and small event activities.
How to use Reaction Time Test
- Press Start and wait while the screen stays red.
- When the screen turns green, click or tap as quickly as you can. Tapping before green counts as a false start.
- After five attempts, check your average time, best time, rank, and per-round records.
Benefits of Reaction Time Test
- The rank is based on five attempts, so it is less affected by a single lucky tap and easier to read as a short trend.
- False starts are retried instead of being counted, making the test feel like a light game that also checks focus.
- It runs entirely on the device with no login or saving, so it is quick to use during events, lessons, or work breaks.
- The result screen groups average time, best time, rank, comment, and per-round milliseconds for easy casual comparison.
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