Keyboard lab
Keyboard repeat and chatter observer
Separate automatic repeat events from closely spaced new presses using an adjustable timing threshold.
How to use this check
Start, focus the keyboard area, then press keys. Tab or Escape ends the test. Nothing typed outside this area is recorded.
What the browser measures
Click here after starting. The drawing shows physical key positions; key and code may differ on your layout. Numeric keypad and other unpictured keys still appear in the log.
Reading the result
Hold one key, then release and tap it once. Events with repeat=true belong to the separate automatic-repeat counter. A short new-press interval can be intentional; the chosen threshold is not a fault standard.
Why results can differ
A browser observes events exposed by your operating system. One test cannot establish whether a device is faulty. Connection, settings, focus and browser behavior can change the results.