Keyboard tester
Just start typing — or better, run a finger along every row of your keyboard, then do it again. Keys go orange on the first press and green on the second. Two sweeps with everything green means every key works. Anything left grey — or stuck on orange — has a problem.
0pressed once ·0confirmed twice ·waiting for a key…
Worth knowing: the Fn key is handled inside the keyboard itself and never reaches the browser, so it isn't shown. The Windows key registers, but may also open the Start menu — that's Windows being Windows, not a fault. Laptops without a numpad or nav cluster will simply leave those grey.
Found a dead key, a whole dead row, or keys typing the wrong characters? A dead row is usually the keyboard membrane; wrong characters are usually settings; and liquid damage is usually both. Either way — that's fixable.