Keyboard Latency Test
Measure how consistently your keyboard registers key presses, run after run.
Click here, then press any key to start
Wait for green, then press a key as fast as you can. 5 rounds.
Last round
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Median
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Best
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Spread
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How it works
Each round the arena waits a random 1–3 seconds, turns green, and times how long until your key press reaches the browser. That number blends your reaction time with the entire input pipeline — switch actuation, keyboard controller, USB or wireless link, OS and browser processing. After five rounds you get the median (the number to compare), your best round, and the spread between best and worst — a tight spread means a consistent input chain.
No browser test can isolate pure hardware latency, so use this comparatively: run the same five rounds with two keyboards on the same computer and browser, and the difference between medians isolates the keyboards themselves. Wireless vs wired, Bluetooth vs 2.4GHz dongle, and gaming vs office boards all produce measurable gaps. Pressing early is caught and the round restarts. For key-level diagnostics — chatter, rollover, stuck keys — head to the keyboard tester.
Troubleshooting
› Is this my keyboard’s true hardware latency?
No single browser test can measure hardware latency in isolation — the OS, browser and display all add time. This test measures consistency and relative differences between keyboards on the same machine.
› Why do results vary between runs?
Background load affects timing. Close other tabs, plug in your laptop and run several rounds — the median across runs is the number to compare.
Frequently asked questions
› What does this test measure?
The delay between a visual cue and your key press registering in the browser, aggregated over multiple rounds. It blends human reaction time with input pipeline delay.
› How do I compare two keyboards?
Run the same number of rounds with each keyboard on the same computer and browser, and compare the median values — the difference between them isolates the keyboards.
› Is lower always better?
For gaming, yes — but consistency matters as much as the raw number. A tight spread between best and worst rounds indicates a stable input chain.