Press any key and watch it light up. Find dead or stuck keys, check rollover, and see key codes — perfect before buying a used keyboard or diagnosing one.
⌨️ Key presses only light up the on-screen keys — nothing is logged or uploaded.
Checking a second-hand or refurbished keyboard? Run through every key in under a minute and spot the dead ones before you pay.
One key acting up? Confirm whether it's the hardware (never lights up) or software, and see if a key is stuck firing on its own.
Press W+A+Shift+Space together — if all light up, your keyboard handles game key combos. If not, it has anti-ghosting limits.
Almost certainly, if every other key works here. Try a different USB port or cable first to rule out a loose connection, then test again.
A few keys are intercepted by the operating system or browser (like media keys, Fn, or some Windows shortcuts) and never reach the page. That's expected, not a fault.
Yes — it works with any keyboard the browser can see, including laptop and external ones.