Question people ask
Yes. It runs entirely in your browser, there is no download, no account and no cost.
Yes. Pick a sound from the Keyboard sound list above the keyboard. Every name there is a real switch sound, and set the volume with the slider at the top of the tester box, slide it to zero for no sound. With sound on, every key press makes a short click, so you can hear each press register as you test. Your choices are saved on your device.
In Full screen test, Print Screen lights up, which means it works. No screenshot happens in full screen, because keyboard lock sends the key to this page instead of Windows. In normal mode it is the other way round: your screenshot happens, but this page cannot see the key. The Windows key and Win + Shift + S never register on any website, because Windows keeps them. If the Start menu or Snipping Tool opens, the key works. You can click that key on screen to mark it tested.
No. The page only listens to key presses while you are on it, to light up the matching key. Nothing is sent anywhere, and the test resets when you leave.
Some keys are limited by the browser or the operating system, for example the Fn key on many laptops and some system shortcuts. If a normal letter, number or punctuation key does not light up, that points to a hardware problem. If a key stays unlit after a firm press, try cleaning under it and testing on another computer if you can, before you replace the keyboard.
Yes. Choose the Mac or Chromebook layout above. The tester shows the Command, Option or Search keys in the right places.
Yes. Layouts include German QWERTZ, French AZERTY, Spanish and Japanese JIS, with more layouts being added. The physical position of each key is what matters, the tester checks the signal from every position.
When you hold several keys and a new key stops registering, your keyboard has hit its rollover limit. The counter beside the keyboard shows how many keys yours accepts at once. Gamers and fast typists feel this most.
A worn switch sometimes sends two signals for one press, so one letter appears twice. This tester watches for repeats that arrive too fast to be human and shows a warning below the keyboard.