Troubleshooting
Press each key to confirm it registers in the tester and to find keys that do not respond. If a key is inconsistent, clean under the cap and check for debris or switch wear. Re-test after reconnecting the keyboard to rule out a loose connector or wireless interference.
Pro tip
Try another USB port or reconnect Bluetooth, then re-run the test to confirm stability.
Common symptoms
- Need full key check
- Some keys not working
- Stuck keys
Keyboard test for all keys is a simple baseline check for missing keys, stuck keys, and combo limits.
People often run this after a spill, after cleaning a keyboard, or when a laptop key feels mushy. It is also useful when buying a used device, because you can quickly see if any key never registers.
This tester shows key down and key up events in real time. It does not repair hardware, but it helps you confirm whether the signal reaches the browser. That is useful because it separates a real keyboard fault from a setting, a shortcut, or an app-specific filter. Keep the keyboard test for all keys run short and repeatable.
If a key only fails in one app, treat it as a software clue. Extensions, overlays, and remaps are common culprits.
When you run keyboard test for all keys, treat it like a simple checklist: press keys one by one, then try a few combinations that matter to you. Press keys in a steady rhythm and watch for any key that fails to show up consistently. If a key only fails sometimes, that can be debris, a weak switch, or a loose connection. A quick replug and re-test can save a lot of guessing.
- Check modifier keys too, Shift, Ctrl, Alt, and Command on some boards - Toggle Num Lock and test the numpad in both modes - If a laptop key is inconsistent, test with an external keyboard for comparison - After cleaning, let the keyboard dry fully before long tests
For more diagnostics pages, browse the Input tests. For the base page you can reuse any time, open the keyboard test tool. If you still feel something is off, re-run keyboard test for all keys after one change at a time so you know what helped.