Mouse Test — Free Online Test
Our online Mouse Test verifies every button, the scroll wheel, and cursor tracking in seconds. It catches the most common mouse faults — double-click errors, dead scroll wheels, unregistered side buttons, and sensor stutter — without installing anything. Whether you are testing a brand-new gaming mouse, troubleshooting an older office mouse, or verifying a warranty replacement, this test gives you a definitive answer before you spend more money.
How to use the Mouse Test
- Click every button — left, right, middle (wheel press), and both side buttons — at least twice.
- Scroll the wheel up and down several times to confirm both directions register.
- Move the cursor smoothly across the tracking pad; watch for jumps or freezes.
- Rapidly double-click the left button to check for the notorious double-click bug.
How to interpret your results
A healthy mouse registers every press instantly, scrolls smoothly in both directions, and tracks the cursor with no visible stutter. If a single click produces two events, the microswitch has worn out — the fix is either warranty replacement or swapping the switch. Scroll wheels that skip or scroll the wrong direction usually have a dirty or failing encoder.
Common issues and what they mean
Double-click on a single press
The left-click microswitch is worn. On many Logitech and Razer mice this is covered under a 2-year warranty. DIY fixes involve replacing the Omron switch (soldering required).
Scroll wheel jumps randomly
Dust in the encoder wheel is the usual culprit. Some users report success spraying a tiny amount of electronic contact cleaner into the wheel and spinning it rapidly.
Side buttons do nothing
Check that vendor software (Logitech Options, Razer Synapse) is installed and that the buttons have functions bound.
When to run this test
- Before the return window closes on a new mouse.
- When games or apps miss clicks.
- To confirm a warranty claim before submission.
Frequently asked questions
Does the test measure DPI or polling rate?
It measures perceived tracking smoothness but not exact DPI. For accurate polling-rate tests, use a dedicated tool like MouseTester.
Why does my wireless mouse feel laggy?
Low battery, USB 3.0 interference on the 2.4 GHz band, or a distant receiver are the top three causes.