Keyboard Tester

Press any key on your keyboard and watch it light up on the virtual keyboard above. Instantly detect stuck, broken, or unresponsive keys — free, in your browser, no download needed.

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How to Use This Keyboard Tester

Click anywhere on this page first so your browser captures keystrokes, then press each key on your physical keyboard one by one. Every working key lights up on the virtual keyboard the moment you press it. When you finish, any key that never lit up is a key your computer isn't detecting — which usually means it's stuck, damaged, or dirty. Press multiple keys together to check whether your keyboard registers simultaneous keystrokes correctly.

What the Keyboard Test Results Mean

A key that lights up instantly is working perfectly. A key that lights up only after a hard press, or intermittently, usually has debris under the keycap or a worn switch. A key that never lights up during the keyboard test is not sending a signal to your computer at all. If that same key fails in a different browser or on another device, the fault is hardware, not software — and you can rule out driver problems before spending money on repairs or a replacement.

Common Reasons a Key Stops Working

The most frequent culprits are dust and crumbs trapped under the keycap, liquid spills that corrode the contacts, switches worn out from heavy use, and outdated or corrupted keyboard drivers. For desktop keyboards, popping off the keycap and cleaning underneath often revives a dead key. Laptop keyboards are harder — if this online keyboard test confirms a hardware fault on a laptop, replacement of the keyboard module is usually the practical fix. Either way, running the test first tells you exactly which keys are affected before you take anything apart.

Works With Every Keyboard Type

This keyboard tester works with anything your device recognizes as a keyboard: built-in laptop keyboards, wired USB keyboards, wireless and Bluetooth keyboards, mechanical gaming keyboards, and Apple Mac keyboards. The test adapts to your system automatically, so there's nothing to configure. Because it runs entirely in your browser, it works the same on Windows, macOS, Linux, and ChromeOS — no software to install, and nothing you type is recorded or stored.

Who Uses an Online Keyboard Test

Anyone with a suspect key can use it, but it's especially useful for a few groups. IT staff and hardware managers testing dozens of keyboards can verify each one in seconds instead of typing into a document. Gamers use the keyboard test to confirm that key combinations register together during fast inputs. Buyers checking a second-hand laptop or keyboard can verify every key works before paying. And if you're troubleshooting typing problems, it's the fastest way to separate a hardware fault from a software one.

Keyboard Tester FAQ