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Tests
Guides for testing your keyboard, mouse, screen, sound, network and other hardware, and for fixing what the tests find.
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Tests
How to see what browser information sites can access
See what a website can learn from your browser, check permissions and exposed details, and limit access to your camera, microphone, and location.
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Tests
Wi-Fi shows full bars but the internet keeps pausing
Full Wi-Fi bars do not guarantee a steady connection. Measure response time, jitter, and drops, then narrow down whether Wi-Fi or internet is at fault.
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Tests
How to build a room-by-room Wi-Fi quality map
Map Wi-Fi quality in every room by measuring response time, jitter, and drops consistently, then use the results to find and fix weak spots.
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Tests
How to verify Wi-Fi improvements after moving a router
Compare Wi-Fi room by room before and after moving your router, using repeatable measurements to see whether coverage and connection quality really improved.
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Tests
Internet slower than your plan? How to test it
Measure download, upload, ping, and jitter, then compare wired and Wi-Fi results to see whether your router, device, or ISP is slowing you down.
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Tests
MIDI keyboard sends duplicate notes: causes and fixes
Find out whether your MIDI keyboard sends each note twice or your music app is duplicating it, then check the most common causes.
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Tests
Why browser MIDI testing does not work in Safari
Safari does not support the browser MIDI access this test needs. Learn how to check your controller in Chrome or Edge and fix common connection issues.
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Tests
How to check your computer specs without installing apps
See your processor, graphics, screen, battery, and other device details in your browser, then learn which specifications you need to check in system settings.
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Tests
How to check phone motion sensors after a drop
Check whether a phone's motion sensors still respond after a drop, understand what the results mean, and know when to change settings or seek repair.
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Tests
Mouse middle-click not working: what to check
Check whether the mouse wheel click registers, then find out if the cause is the mouse, a browser setting, an app shortcut, or a touchpad gesture.
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Tests
How to check a secondhand mechanical keyboard
Check every key, test rollover, and inspect switches, stabilizers, cable, and wear before buying a secondhand mechanical keyboard.
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Tests
External display looks stretched: fix resolution and scaling
Check the external screen's resolution and scaling, then fix stretched images, oversized text, or black bars in Windows 11 or macOS.