I built InputBench, a free browser-based site for testing common mouse and keyboard problems.

Most online input tests show raw events or simple counters. I wanted something more useful for normal troubleshooting: do the simple action first, then get a plain-language explanation of what the browser actually received.

Current tools include:

• Scroll Test: checks mouse wheel direction, reverse scroll signals, sensitivity, and stability
• Mouse Test: checks left, right, middle, back, forward, and wheel input
• Double Click Test: checks whether one physical click may be registering as repeated triggers
• Keyboard Test: checks keydown/keyup behavior
• Polling Rate Test: estimates browser-observed mouse Hz
• Spacebar Clicker: measures spacebar CPS/PPS

The important limitation is intentional: browser tests cannot prove hardware damage. They can only show browser-observed signals, such as repeated reverse scroll events or suspicious sub-80ms click intervals. That makes them useful as a first diagnostic step before changing settings, cleaning a mouse, or replacing hardware.

Site: https://inputbench.com/