The Keyboard Tester highlights each key on a virtual keyboard the moment you press it, so a dead or sticky key is impossible to miss. It tracks every keystroke - including which physical key fired, its key code and location - and keeps a running list of everything you have tested so far.
Use it when a laptop key stops responding, when a mechanical keyboard feels mushy, or simply to verify a new board before the return window closes. Works with standard, laptop and multimedia keyboards, and nothing you type is recorded.