Mouse scroll jump test for wheel encoder skips
Test a mouse scroll wheel for skipped ticks, reverse direction jumps and encoder irregularities in your browser.
Start the mouse testDetect skipped or reversed scroll wheel events
Scroll slowly up and down, then quickly reverse direction. Rapid inversions are highlighted for a closer hardware check.
Rapid inversions0
Scroll inside this panel0 ↑, 0 ↓No rapid inversions yet
Encoder status: No jumps detected
Why a mouse wheel scrolls the wrong direction
Scroll slowly in each direction, then use short direction reversals. Clean the wheel and test another surface before deciding whether an encoder is failing. Dust around an encoder can cause occasional skips; repeated reversals after cleaning point more strongly to a worn wheel encoder.