Double-Click Test

How to use

1. Click normally. Click the test area with any button the way you usually do, a dozen times or more. The first button you press is the one we track.
2. Watch the gap. Last gap shows the milliseconds between your two most recent clicks. Real single clicks sit hundreds of ms apart.
3. Read the verdict. Any gap under 50 ms counts as chatter. Even one during normal clicking points to a worn switch.
4. Switch buttons. To check the right, middle, or a side button, press Reset and start clicking with that button.

Why test this

One press, two clicks. That's mouse chatter, and it starts the moment a worn switch bounces its contacts. Most switches are rated for around 20 million clicks, but the metal inside fatigues and double-fires long before that. The fault hurts normal work as much as games. A single click opens a file twice. Drag-and-drop lets go early. In a match one shot becomes two, or a tap turns into a burst. Early on it's intermittent, so you blame your hand or the software before the hardware. This test puts a number on it. If the switch double-fires under your normal clicking here, it does the same everywhere. That's the proof you want for a warranty claim or RMA. Run it on a used mouse before you trust it, or after a contact cleaning to check whether the fix held.

What the results mean

Four numbers describe your clicking. Clicks counts every press of the button you started with. Chatter counts presses that landed within 50 ms of the last one. Last gap and Min gap show, in milliseconds, the interval between your two latest clicks and the smallest gap so far. Deliberate clicks sit hundreds of milliseconds apart, so a healthy mouse keeps Chatter at zero and Min gap well above 50 ms. Any chatter is worth a second look. Repeated chatter during plain single clicks means the switch is failing. The verdict turns from a warning to a green all-clear once you click enough without tripping 50 ms. A genuine fast double-click can dip near that line, so judge by whether the count rose when you only meant to click once. If a side button does nothing here, your mouse software may have remapped it to a keyboard shortcut, so the browser never sees a press. Press Reset to test a different button.

FAQ

What is mouse chatter?

Chatter is one physical click that registers as two. A worn switch bounces its contacts and sends a second signal, which lands here as a gap under 50 ms.

Why does my mouse double-click when I only pressed once?

The contacts inside the switch are bouncing. As they wear, one press makes the circuit open and close fast enough to read as two clicks, and it gets worse over time.

Can I test the right, middle, or side buttons?

Yes. The first button you press is the one the test tracks. Press Reset, then click with the right, middle, or a side button to check it on its own.

How many chatter clicks mean the switch is failing?

Even one during normal clicking is worth noting. Repeated chatter while you click once at a time means the switch is on its way out and needs repair or replacement.

Why does the gap drop near 50 ms on a good mouse sometimes?

A real fast double-click can land close to the line. Chatter is different: you clicked once but the counter rose by two. Judge by what you intended, not the number alone.

Can I fix a chattering mouse instead of replacing it?

Sometimes. Contact cleaner can buy a few months, and replacing the switch is a permanent fix if you can solder. Under warranty, claim a replacement instead.

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