Chatter & key event test
Inspect individual key events, suspicious rapid represses, held keys, and a basic rollover peak.
Run chatter testKeyboard diagnostic tools
Test one symptom at a time.
Each tool runs locally in your browser and explains exactly what its result can—and cannot—prove.
Latency & repeat rate
Compare browser-observed repeat delay, event intervals, timing variation, and tap spacing.
Run timing testRollover & ghosting
Hold practical game or shortcut combinations and see every simultaneous key the browser receives.
Run rollover test