Hardware Test makes free tests for the hardware you use every day: keyboards, mice, controllers, webcams, and screens. They open instantly and need no app or account. Every test runs on your device, and nothing you type, click, or film is uploaded.
Each page explains what the test measures, what the result means, and what a browser can't see, so you know how far to trust it.
For microphones, speakers, and sound levels, see our sister site Soundlevel.
The site is free and is supported by ads and affiliate links.