If your mouse is misbehaving — a button that skips, a cursor that drifts, clicks that register twice — you don't need to guess. Everything about a mouse can be tested in a few minutes, right in your browser, with no downloads. This is the complete checklist I use to test whether a mouse is working properly, from the most common faults to the subtle ones.
Work through it top to bottom. Each step links to a free tool that isolates one part of the mouse.
The 60-Second Quick Check
Short on time? These three catch the majority of real faults:
- Buttons — do left, right, middle, and side buttons all register? → Mouse Button Test
- Double-click — does one press ever register as two? → Double Click Test
- Tracking — does the cursor move smoothly with no drift? → Mouse Drift Test
If all three pass, your mouse is almost certainly healthy. For a thorough check, keep going.
1. Test Every Button
Start with the buttons, since a dead or mushy button is the most common complaint. Open the Mouse Button Test and press each button in turn — left, right, middle (the scroll-wheel click), and the two side buttons if your mouse has them. Every press should light up instantly.
- Nothing happens on a side button? It may be remapped in your mouse software (Logitech G HUB, Razer Synapse). Reset it to its default action.
- Not sure which button is which? The What Mouse Do I Have tool names each button as you press it.
2. Check for Double-Clicking (Chatter)
A worn switch makes a single press register as two clicks — maddening when dragging or selecting. Open the Double Click Test and click slowly, once at a time. If the tool records doubles from single presses, your mouse has chatter. It can sometimes be fixed by cleaning the switch; otherwise the switch needs replacing.
3. Test the Scroll Wheel
Open the Scroll Wheel Test and scroll up and down. Scrolling should be smooth and register in the correct direction with no skipped or reversed steps. A wheel that jumps the wrong way or misses steps usually means a dirty or failing encoder.
4. Verify Click-and-Hold
Dragging files or aiming down sights depends on the button staying held. Open the Mouse Hold Test, press and hold, and confirm the button stays registered the whole time without releasing on its own.
5. Check the Sensor: Drift, Jitter, and Stutter
The sensor is the heart of the mouse. Three faults to rule out:
- Drift — cursor moves on its own when you're not touching the mouse → Mouse Drift Test
- Jitter / micro-stutter — the cursor shakes or hitches during steady movement → Mouse Jitter Test
- Tracking accuracy — the cursor faithfully follows your hand → Mouse Tester Sensor
Always test on a proper cloth or hard mouse pad. Glass and glossy desks confuse optical sensors and cause false faults.
6. Measure DPI and Sensitivity
If the cursor feels too fast or too slow, check your sensitivity. The Mouse DPI Test measures your real DPI using a ruler, and the DPI Calculator converts sensitivity when you switch mice. Remember to turn off "Enhance pointer precision" in Windows for consistent results.
7. Test Polling Rate and Latency
For gaming, responsiveness matters as much as accuracy:
- Polling rate — how often the mouse reports its position, in Hz → Polling Rate Test
- Latency / input lag — the delay between your click and the response → Mouse Latency Test
Aim for a steady 1000 Hz polling rate and consistent, low latency. If either is erratic, try a different USB port and disable USB power-saving.
Full Checklist at a Glance
| What to test | Tool | A healthy result |
|---|---|---|
| All buttons | Mouse Button Test | Every button registers instantly |
| Double-click fault | Double Click Test | One press = one click |
| Scroll wheel | Scroll Wheel Test | Smooth, correct direction |
| Click-and-hold | Mouse Hold Test | Stays held, no release |
| Drift | Mouse Drift Test | Cursor stays still when idle |
| Jitter / stutter | Mouse Jitter Test | Smooth tracking line |
| DPI | Mouse DPI Test | Measured DPI matches setting |
| Polling rate | Polling Rate Test | Steady 1000 Hz |
| Latency | Mouse Latency Test | Low, consistent ms |
When to Repair vs Replace
- Double-clicking or a dead button — a switch fault. Worth repairing on an expensive mouse, otherwise replace.
- Drift or stutter that survives a clean and a new pad — likely a failing sensor. Usually time to replace.
- High or erratic latency only — often the connection, not the mouse. Change USB port, update drivers, or switch from Bluetooth to a 2.4 GHz dongle before giving up on the mouse.
Run through this checklist whenever your mouse feels off. In most cases you'll pinpoint the exact fault in under five minutes — and know whether it's a setting, the connection, or the hardware. Start with the Mouse Button Test and work down the list.