Keyboard Test
Press every key to check for stuck, dead, or unresponsive keys.
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About this tool
This is a free browser-based diagnostic tool provided by TechTest (ay5uh.com) to help you test and troubleshoot your hardware. It runs entirely on your device with no installation required.
Frequently Asked Questions
How do I fix a key that isn't registering?
First, try cleaning under the keycap with compressed air. If it's a mechanical keyboard, you may need to replace the switch. For laptop keyboards, a single dead key often means the entire keyboard assembly needs replacement.
Why does my keyboard type double letters?
This is known as "key chatter" and is usually caused by dust or debris inside the mechanical switch. Cleaning the switch with isopropyl alcohol often fixes the issue without needing a replacement.
Can this tool test Mac and Windows keyboards?
Yes! Our online keyboard tester is OS-agnostic and works seamlessly across macOS, Windows, ChromeOS, and even Linux devices directly in your browser.