Display
Input devices
Performance
Every test on CheckItWorks, grouped by what it checks.
Dead Pixel Test
Cycle through solid colors to spot dead, stuck, or hot pixels on any screen in under two minutes.
Keyboard Test
Light up every key as you press it and track your keyboard's real rollover limit live.
Internet Speed Test
Measure download, upload, ping, and jitter in your browser, and see why the number differs from your plan.