Test Windows input before changing drivers
Use this PC keyboard test with the full-size ANSI-style reference layout. Your keyboard may have extra ISO, JIS, laptop or programmable keys. An unused position on the diagram is not evidence of a fault, and a layout-completion percentage is not a hardware certificate.
The event inspector shows code for the reported key position and key for the interpreted value. A wrong character with a consistent position suggests checking the selected input layout, modifiers and remapping. The browser cannot directly inspect the switch or determine which connected keyboard sent the event.
Windows and the browser can handle shortcuts before the test receives them. Press modifiers separately first. Avoid lock-screen, close-window and task-switching combinations; a website cannot promise to suppress every shortcut. Print Screen may open a capture interface or produce an incomplete event sequence.
Use a normal text editor as a comparison. If the same key fails there, try another connection or computer where available. If only the page fails, compare focus, browser extensions and another browser before reinstalling software.
Read how our browser tests work for event handling, measurement limits, and privacy details.