Keyboard reaction test
Find out which keys actually hold you back — not because of typing speed, but pure reflex — and train them with focus.
Keyboard reaction test
Press the key that lights up, as fast as you can react. No pressure timer — this is a diagnostic, go at your own pace to begin.
or press Space to start
What the keyboard reaction test is
When you type fast, not every key responds equally fast — and it's not always about practice. Each finger has a different natural reflex: the index finger, which does most of the work, reacts faster than the pinky, which only covers a handful of keys on each hand. This test isolates that variable: instead of measuring how many words you type per minute, it measures the exact time (in milliseconds, using the browser's high-precision clock) between seeing a key light up and pressing it.
Why a per-finger diagnosis matters
General typing practice improves overall speed, but it rarely points to WHICH specific key is holding you back or WHY (is it the finger, the row, lack of habit?). At the end of the test, you'll see your 5 slowest keys flagged with their exact finger and row, compared against a reference for that specific finger — so you know whether it's worth training or just your pinky's normal pace.
How the trainer works
From the diagnosis you can train your slow keys directly: for each one, you'll see which finger controls it and which home-row key it should move from, with a short set of repetitions alternating both keys and then real words containing it. You'll watch your average drop live during the session — the improvement is noticeable right away, and it sticks by repeating the diagnosis week after week.
Frequently asked questions
What exactly does the keyboard reaction test measure?
The time, in milliseconds, it takes you to press each key after it lights up on screen. It measures visual-motor reflex, not typing speed (WPM).
Why are my pinky fingers slower?
That's normal: pinky fingers have less strength and training than the index finger for most people. The test compares each key against a reference for THAT finger, not against your fastest finger overall.
How often should I repeat the test?
Once a week is enough to see real progress. Testing every day won't give you more useful information and can add pressure — this is a diagnostic tool, not a competition.
Does the trainer really improve my reflexes?
A single session already shows a visible improvement (warm-up and familiarity effect). Lasting improvement comes from repeating the diagnosis and training week after week.
Do I need to sign up?
No. The test works without an account; if you sign in, your history syncs across devices.

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