A complete mouse test covers four checks: button function (do all buttons work?), scroll wheel (smooth or notched?), double-click detection (is a worn switch double-firing?), and click speed (CPS). All four run in your browser. Use for a new-mouse buyer check or to diagnose a mouse that's misbehaving.
A mouse test is a diagnostic tool that verifies your mouse's hardware is working correctly. Complete browser-based mouse tests cover: button function (left, right, middle, side buttons all register), scroll wheel (both directions work, no dead spots), double-click detection (single clicks aren't being registered as double), click speed (CPS) (how fast you or your mouse can produce clicks), and input latency (milliseconds from click to registration). The most common mouse problem is switch wear — over time, mouse switches develop a fault where a single physical press registers as two clicks. Symptoms: files opening twice, drag operations dropping, text-editor double-word selection. Test with a slow deliberate 2 CPS click loop; anything above 2 CPS reported means your switch is double-actuating. Other common issues: scroll wheel getting notchy or reversing direction (encoder wear), side buttons not registering (loose ribbon cable), inconsistent DPI (sensor drift). Mouse tests take 2 minutes and diagnose 90% of hardware problems.
| Check | What it verifies | Failure sign |
|---|---|---|
| Button function | All buttons register on press | Missing click events |
| Scroll wheel | Both directions smooth, no notches | Reversed, skipping, or dead scroll |
| Double-click detection | Single presses = single clicks | Slow 2 CPS test showing 4+ CPS |
| Click speed (CPS) | Full-rate click detection | Dropped clicks at high CPS |
| Cursor tracking | Smooth movement, no jump | Cursor jitter, dead zones, warp |
Open any page. Left-click, right-click, and middle-click on non-clickable text. All should trigger context menus or highlight actions. Side buttons should navigate browser history.
Scroll a long page up and down. Should be smooth in both directions. Test middle-click (autoscroll on Windows).
Open our CPS test. Click slowly and deliberately, targeting 2 CPS. If the test reports 4 or more CPS, your mouse switch is double-firing.
Set the CPS test to 10 seconds. Click as fast as you can. This benchmarks both your hand and your mouse's ability to keep up.
Move the cursor slowly in a square pattern. Watch for jitter, dead spots, or warping. Use mouseaccuracy.com for a quick precision test.
Switch wear. Replace the switch (Omron or Kailh D2FC-F-7N, $2 each) or replace the mouse. Optical-switch mice (Razer Viper) don't have this problem.
Encoder wear or debris. Blow compressed air through the wheel. If persistent, encoder replacement or new mouse.
Loose ribbon cable inside the mouse. Open the case, reseat the connector. Common on 3+ year old mice.
Dirty sensor lens (blow air), bad mousepad surface (glossy = bad for optical), or dying sensor (replace mouse).
A mouse test is a diagnostic tool that verifies your mouse's buttons, scroll wheel, double-click behavior, and click speed all work correctly. Full browser-based tests take 2 minutes and diagnose 90% of common hardware problems — missing clicks, worn switches, dead side buttons, jittery cursor.
Open our CPS test. Click slowly and deliberately — target 2 clicks per second (2 CPS). If the test reports 4+ CPS, your mouse switch is double-actuating on single physical presses. This is the classic sign of switch wear.
Yes. Left, right, middle, and forward/back buttons all fire distinct events readable by browser JavaScript. Any page that responds to context menu (right-click) and standard clicks works as a button test. mouseaccuracy.com and buttonchecker.com are dedicated tools.
Scroll a long page slowly in both directions. Issues to watch for: reversed direction (encoder assembly backwards), missed scrolls (dead zones on the wheel), scrolling in the opposite direction (encoder failing). Persistent issues = encoder replacement or new mouse.
Micro-switch wear. Standard mouse switches (Omron D2FC series) are rated for 10–50 million clicks. Heavy gaming use burns through rated life in 1–3 years. When the metal contacts inside develop micro-arcing, single presses register as double actuations. Switch replacement is $2 in parts.