Mechanical Keyboard Key Chatter & Double-Click Diagnostic
Type freely on your keyboard below to automatically detect phantom double-typing, micro-second contact bouncing, and worn mechanical leaves.
| Key | Time Delta (ms) | Status |
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Frequently Asked Questions
What is keyboard key chatter (switch bounce)?
Key chatter occurs when a mechanical switch's internal metal contact leaves degrade, corrode, or collect dust. When you press the key once, the leaves vibrate and make contact multiple times in rapid succession (within 5ms to 30ms), causing your PC to register duplicate keystrokes (e.g. typing 'tteesstt' instead of 'test').
What chatter threshold should I use for testing?
Human fingers physically cannot press and release a mechanical switch faster than ~60 to 70 milliseconds. Therefore, any duplicate key event registered under 30ms is almost certainly a hardware electrical defect (switch chatter).
How do I fix a chattering mechanical keyboard switch?
1. For hot-swappable keyboards, simply pull out the chattering switch and insert a fresh one. 2. For soldered keyboards, unplug the board and apply 1-2 drops of 99% Isopropyl Alcohol (IPA) into the switch stem while spamming the key to clean oxidization off the leaves. 3. Alternatively, increase your keyboard's debounce algorithm delay in software (e.g. from 2ms to 8ms in QMK/VIA).
Do optical or Hall Effect keyboards get key chatter?
No. Optical switches use infrared light beams and Hall Effect switches use magnetic sensors. Because there are no physical metal leaves to vibrate or oxidize, they are immune to mechanical key chatter.