Before you download anything, know what each type of keyboard test utility can actually see. This comparison covers browser-based testers, vendor driver suites, desktop utilities, built-in OS tools, and cross-device testing — including the specific jobs only a downloadable utility can do.
Ghosting is why holding seven keys can make a sixth stop responding — and why that is not a bug in most keyboards. This guide explains the matrix circuit behind it, how to measure your keyboard's actual rollover with a simple hold test, and why NKRO still has limits.
A dead key test tells you exactly which keys have stopped registering, which is the one piece of information every repair decision depends on. This guide covers how to run one, how to tell a dead key from a stuck or intermittent one, and how to narrow the cause down to hardware or software.
Everything you need to run a full keyboard test online, from the first keypress to a saved report: choosing the right layout, reading the progress and untested-key list, checking rollover, and understanding which keys a browser can never see.