Keyboard Tester Free Online Key Test

Click inside the keyboard tester, then press each physical key once. The matching key should light up and appear in the key history. Test letters, numbers, modifiers, arrows, numpad, and shortcuts separately so you can see missed keys, wrong symbols, or repeated input clearly.

No. This is a browser keyboard tester, so it runs on the page without an app, extension, or account. Use it on Windows, Mac, Chromebook, Linux, laptop, USB, Bluetooth, and compact keyboards as long as the browser can receive normal keyboard events.

Yes. KeyboardTester.click is open source under the MIT License and the full source code is public on GitHub. You can read how every test works, report issues, or reuse the code within the license terms. The domain name, logo, and some third-party assets keep their own separate rights.

Yes. The free KeyboardTester.click Windows app is on the Microsoft Store, and the download page also lists installer and portable Windows builds. Android users can install the KBT Measure Suite APK, a beta companion app for phone sensor and measurement tests like the ruler, level, vibration, and touch screen checks.

If keys fail here and in other apps, check the cable, Bluetooth battery, USB port, OS keyboard layout, and physical switch or membrane. If keys work here but not in one app or game, the problem is usually app focus, shortcut capture, permissions, or an in-game binding.

Press the problem key slowly and watch whether it records once, repeats rapidly, or stays highlighted after release. A chatter pattern usually means one press creates multiple history entries. Use the stuck key test when you need a focused repeat-input check.

Yes. It can reveal common ghosting and rollover limits by showing which held keys register together. Hold gaming combos like WASD with Shift and Space, then compare the highlights. For deeper combination checks, use the keyboard ghosting test.

Yes. Use the Keyboard size selector above the visual board and choose 60%, 65%, 70%, 75%, TKL/80%, or full-size before testing. Compact keyboards often put arrows, function keys, Delete, Home, End, Page Up, or Page Down behind Fn layers, so test the key combinations that send those outputs. The Fn key itself may not appear because most keyboard firmware handles it before the browser receives a key event.

Yes. The test works with most desktop, laptop, wired, wireless, Bluetooth, Windows, Mac, Chromebook, and compact keyboards. Browser and OS shortcuts may still intercept some keys, and Fn-layer or media keys may not expose standard key events to any website.

No. The key test runs in your browser and displays the result on the page. The tool does not need a login, download, or server upload for normal key testing. Avoid typing passwords or private text into any keyboard tester, including this one.