Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tools
How to remove duplicate rows from a CSV file
Remove identical rows from a CSV in your browser, check what counts as a duplicate, and save a clean copy without changing the original.
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Tools
How to edit a huge CSV without opening Excel
Open and edit a large CSV in your browser, find or sort rows, remove duplicates, and save a corrected copy without launching Excel.
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Tools
How to find and replace values in a large CSV
Find a value in a large CSV, check matching rows, edit the right cells, and save a clean copy without changing other data.
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Tests
How to test a used webcam before buying it
Check a used webcam's image, focus, frame rate, cable and mount before you pay, with a browser camera test and a short list of warning signs.
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Tests
Why your microphone sounds too quiet
Learn why your microphone sounds quiet, test its input level in your browser, and work through settings, placement, and app fixes that can help.
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Tests
Why your spacebar only works when pressed hard
If your spacebar only works when you press hard, test whether the key is failing, then clean it safely and check settings that can delay input.
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Tests
Webcam looks too dark even in a bright room
Find out whether your webcam is actually dark or the app is causing it, then fix lighting, camera settings, permissions, or a blocked lens.
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Tests
Camera works in one app but not another
Find out why your camera works in one app but not another, then check permissions, device selection, and settings with a quick browser test.
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Tests
Microphone sounds robotic or distorted: fixes
Find out whether a robotic microphone sound comes from clipping, Bluetooth, browser processing or an app, then try fixes for Windows and Mac.
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Tests
How to tell which microphone your PC is using
See which microphone your PC sends sound from, compare connected mics in a browser test, and fix the wrong input in Windows or an app.
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Tests
What to look for in a PC system information report
Learn how to read processor, graphics, screen, battery, and network details in a browser-based PC report, and spot what needs a closer check.
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Tests
How to find device information before contacting support
Gather your processor, graphics, screen, battery, and network details, then add your device model and symptoms to make a useful support request.