The selected threshold flags short intervals between independent keydown events; automatic repeats are ignored. Intentional fast presses and software can also produce short intervals. Slow retesting is needed before diagnosing the cause.
The selected threshold flags short intervals between independent keydown events; automatic repeats are ignored. Intentional fast presses and software can also produce short intervals. Slow retesting is needed before diagnosing the cause.
Choose settings before starting. Changing them clears the previous sample; stop the test to copy a fixed result.
Tap a key deliberately about once per second. Start begins a fresh sample; after stopping or losing focus, old presses are not joined to the next sample.
Start focuses this area. Keys are captured only here; Esc pauses capture. Navigation, form controls and copy remain available.
Keys you press will be listed here.
• Key chatter is when one press of a key is sent to the computer as two or more presses, so you get doubled letters like “thhe”.
• The selected threshold flags short intervals between independent keydown events; automatic repeats are ignored. Intentional fast presses and software can also produce short intervals. Slow retesting is needed before diagnosing the cause.
• Holding a key down makes your operating system repeat it. Those auto-repeat events are marked by the browser and ignored, so a long press never counts as chatter.
• Keys with flagged short intervals turn red. The table orders keys by their share of short intervals, then the number of flags.
• Spend more time on keys that repeat unexpectedly in your normal use. Tap slowly and consistently, and compare repeated attempts.
• The home page also flags short intervals. This page adds per-key interval shares, an adjustable threshold and a heat map.
Key chatter describes unintended repeated input from one physical press, such as doubled letters. This page cannot see the physical press: it screens separate keydown events for short gaps. Hardware, firmware, software and intentional fast taps can produce different causes behind similar observations.
For each key, the table counts received non-repeat keydown events and the gaps between adjacent events of that key. The short-interval share is flagged gaps divided by all comparable gaps, not by physical presses. Red shading indicates short intervals; it does not diagnose a faulty switch.
Similar short intervals can come from different causes, including intentional fast taps, input software, firmware or hardware. A change on another computer points to a difference in the setup, but does not isolate the cause by itself. Change one condition at a time and keep the threshold and tapping pace comparable.
First repeat slow, deliberate taps. Compare with remapping or macro software closed, then another browser or computer, changing one condition at a time. Persistent unexpected repetition warrants further diagnosis. Follow the keyboard maker’s cleaning, firmware and service instructions; this result alone does not justify replacing a switch.
The selected threshold flags short intervals between independent keydown events; automatic repeats are ignored. Intentional fast presses and software can also produce short intervals. Slow retesting is needed before diagnosing the cause.
The browser only sees presses after the keyboard firmware and operating system have handled them, so it cannot see bounce the firmware already filtered. On-screen keyboards cannot be tested.
What key chatter is, how to confirm it and how to fix it
If your results look strange or you are unsure what they mean, contact our support team.
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Keys typing twice from one press? Confirm chatter with a test, rule out settings, clean the switch, raise debounce in QMK or VIA, or replace the switch.
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