Mouse Test: Check Every Button and the Wheel

Press each button inside the box and scroll both ways. The diagram lights up as you go, the checklist shows what is left, and the result tells you whether a silent button is broken, remapped, or simply not on your mouse.

Updated 18 October 2026 · 2 sources

Point inside the box and press every button once, then scroll both ways. Clicks here do nothing else — right-click, wheel click and the side buttons are blocked from opening menus or going back a page.

1 · Which buttons does your mouse have?

2 · Press, scroll and hold inside the box

0/7checks

Left click
Right click
Wheel click
Scroll up
Scroll down
Back (side)
Forward (side)
Tilt left
Tilt right

Waiting for input…

Event log

Short answer

Point inside the test box, press left, right, wheel click and the back and forward side buttons, then scroll both ways. Each one lights up and is ticked off. If a button shows a key in the event log, the mouse software has remapped it. If nothing registers on two different computers, the switch has failed.

How to use it

Pick your layout. Three buttons, five buttons with side buttons, or five plus a tilting wheel. The result only expects what your mouse has.
Press every button inside the box. Right-click, wheel click and the side buttons are blocked from opening menus or going back a page while you point inside the box.
Scroll and tilt. Roll the wheel up and down once each. On a tilt wheel, push it left and right.
Show the result. Anything that never lit up is listed. A button that fires twice within 80 ms is flagged as possible double-clicking.

What this mouse button test checks

It checks every button and the wheel in under a minute, covering everything a browser can see from a mouse:

Left click, right click and wheel click — the three main switches.
Back and forward side buttons — the two thumb buttons on most five-button mice.
Scroll up and scroll down — the wheel encoder.
Tilt left and right — horizontal scrolling on tilt wheels.

Each part lights up on the diagram while it is held and turns green once it has registered. The checklist only expects the buttons on the layout you choose, so a three-button mouse is not marked as failing because it has no side buttons.

Mouse button not working? Broken, remapped or missing

When a button never lights up, there are three very different causes:

What you see	Most likely cause	What to do
Nothing at all, on two computers	The switch has failed	Warranty, or replace the switch
A key appears in the log instead	Remapped in the mouse software	Reset button assignments to defaults
Nothing, but only on this computer	Software, driver or a profile	Close the mouse software, re-plug, test again

The keystroke check matters because gaming mouse software can turn a side button into a key combination, and the browser then never receives a click. This test listens for keys while you point inside the box and tells you when that happens.

Mouse side button test without leaving the page

Pressing back on a normal page takes you to the previous page. Inside the test box, the back and forward buttons are blocked, along with the right-click menu and the wheel-click autoscroll, so you can press them freely. If the browser still goes back, the button clearly works — come back with forward and your ticks are kept.

Mouse click test: what a healthy click looks like

Each press inside the box should light the button once and release cleanly. Click each main button slowly five times. A healthy switch registers every press, never two from one, and the event log names the button you actually pressed. If a left click shows as a right click, swap the buttons back in your system settings — on Windows, Settings → Bluetooth & devices → Mouse → Primary mouse button; on macOS, the secondary-click setting.

Early warning for double-clicking

If the same button fires twice within 80 ms — faster than anyone presses deliberately — this test flags it. That is the first sign of a wearing switch. Confirm it with 50 slow clicks in the Double Click Test.

What a browser mouse test cannot see

DPI and sensor quality. The browser only sees the cursor after your operating system applies pointer speed and acceleration.
DPI, profile and sniper buttons. These are normally handled inside the mouse and never reach the computer as clicks.
Polling rate. Use the Mouse Polling Rate Test for that.

What each button usually means

Left, right, wheel click

Every mouse has these. If one is dead on two computers, the switch is worn.

Back and forward

The two side buttons on most five-button mice. Forward is usually the one nearer the front.

Tilt wheel

Pushing the wheel sideways sends horizontal scroll. Common on productivity mice.

DPI and profile buttons

Usually handled inside the mouse and invisible to the browser. Nothing appearing for them is normal.

If something goes wrong

Side buttons do nothing

Mouse software often remaps them to keys or turns them off. If the log shows a key instead of a click, reset the button assignments to defaults.

Left and right are swapped

Your operating system has the primary button set to right. Change it back in the mouse settings.

A click sometimes registers twice

Run 50 slow clicks in the Double Click Test to confirm switch chatter.

Open Double Click Test

The wheel scrolls the wrong way now and then

That is a jumping wheel. The Scroll Wheel Test counts reversed ticks.

Open Scroll Wheel Test

FAQ

How do I test mouse buttons online?

Point inside the test box and press each button once: left, right, wheel click, and the back and forward side buttons. Each one lights up on the diagram and is ticked in the list. Then scroll up and down. Tap Show my result to see anything that did not register.

Why is my mouse side button not working?

Most often the mouse software has remapped it — to a keystroke, a DPI change, or nothing. If the event log shows a key when you press it, that is a remap, not a fault. Reset the buttons to defaults. If nothing at all appears on two computers, the switch has failed.

Can a mouse tester check DPI?

Not reliably. Browsers see cursor movement after the operating system has applied pointer speed and acceleration, so the true sensor DPI cannot be read. Set DPI in the mouse software.

Why does the left button show as right?

The primary button is swapped in your operating system mouse settings, often for left-handed use. The browser reports what the system sends.

Is anything sent to a server?

No. The mouse checker runs entirely in your browser and only listens to clicks inside the test box.

Sources

Mouse