Guides & troubleshooting

TapTest guides

Short, practical guides to help you get the most out of your keyboard and controllers. All of them pair with the free tester.

Why is a key on my keyboard not working?

A key stopped working? Here are the most common causes, from debris and worn switches to Windows Filter Keys, plus step-by-step fixes to get it typing again.

ANSI vs ISO vs JIS: keyboard layouts explained

ANSI, ISO and JIS are the three main physical keyboard layouts. Here is what makes each different, how QWERTY, QWERTZ and AZERTY fit in, and which to choose.

How to test a game controller on PC

Check every button, trigger and thumbstick on your Xbox, PlayStation or PC controller. Three ways to test a gamepad, plus fixes for stick drift and detection problems.

Keyboard ghosting and N-key rollover (NKRO) explained

Why do some keys stop registering when you press several at once? A plain-English guide to keyboard ghosting, rollover, anti-ghosting and NKRO, and how to test yours.

Mechanical keyboard switches explained

Linear, tactile or clicky? A plain-English guide to mechanical keyboard switch types, what the colours mean, and how to choose the right feel for gaming or typing.

Typing speed test: what is a good WPM?

What is a good typing speed? Learn how words per minute (WPM) and accuracy are measured, what counts as fast, and test your own speed free in your browser.