TestLap
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Online mouse and touchpad test

Check every button, catch switches that bounce, test scrolling, and draw to see whether the touchpad skips or stutters.

Button test area

Left
not pressed
Middle
not pressed
Right
not pressed

Click anywhere inside this box. Right-click will not open a menu.

Clicks

0

Double-clicks

0

Too-fast clicks (<40 ms)

0

Possible switch bounce

Scroll

—

0 up · 0 down

Last input device

—

Position: 0, 0

Draw and scroll area: hold the left button and draw, or scroll with the wheel / two fingers

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Draw circles and diagonals. A smooth line that follows your hand is good. Gaps or jumps mean a faulty touchpad or mouse.

Runs entirely in your browser. No data, images or audio are ever uploaded.

How to test in 3 steps

  1. 1

    Try each button

    Left-, right- and middle-click (press the wheel) inside the test area. Working buttons turn green. Try double-clicking too.

  2. 2

    Move and scroll

    Draw inside the frame with the mouse or touchpad. Scroll up and down with the wheel or with two fingers.

  3. 3

    Read the results

    The line should be continuous. The double-click count must match what you actually did; extras mean a bouncing switch.

Reading the results

  • All three buttons green, double-click count matches what you did: buttons are fine.
  • Slow single clicks still raise the "too-fast clicks" counter: bouncing switch. On a one-piece touchpad that means replacing the whole touchpad.
  • Middle button never lights up: normal on most touchpads, which have no middle button. On a mouse it means the wheel switch is broken.
  • Jagged or broken line: dirty touchpad, damp fingers or a degraded sensor. Large jumps point to a hardware fault.
  • Uneven scrolling, fast then slow: worn mouse wheel, or a touchpad that loses the second finger.

Touchpad tips for used laptops

  • Press down in all four corners of the touchpad. A corner with no click or that sinks unusually deep means a loose touchpad or a swollen battery beneath it.
  • Try a three-finger swipe up (Task View) and a two-finger pinch in the browser to confirm multi-touch gestures work.
  • Next, run the touchscreen test if the laptop has one, or go straight to the battery check.

Frequently asked questions

One click registers as two (phantom double-click)+

A worn micro-switch is "bouncing". Very common on old mice and well-used touchpads. The tool counts clicks and double-clicks: if you click slowly one at a time and the double-click counter still rises, the switch is worn out.

Two-finger scrolling does not work on the touchpad+

Check Settings → Bluetooth & devices → Touchpad and enable Scroll and zoom. If it is enabled and still fails, the driver may be wrong or the touchpad is an old single-touch model.

The drawn line breaks up or jumps around+

Touchpad: dirty surface, damp fingers, or a touchpad pushed up by a swelling battery underneath. Mouse: glossy mouse pad, dirty sensor or a weak battery. Clean everything and retry before concluding.

Left and right click are on the same surface+

A one-piece clickpad tells left from right by finger position: bottom-left corner is a left click, bottom-right is a right click. Press the correct corner.

The touchpad feels stuck and does not spring back+

A swollen battery pushing up the touchpad, or a broken touchpad hinge. A swollen battery is a safety hazard; do not buy that laptop.