Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tests
Stuck pixel vs dead pixel: how to tell them apart
Learn how a stuck pixel differs from a dead pixel, test your screen with solid colors, and find out whether a flashing fix is worth trying.
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Tools
How to inspect a 10-million-row CSV file locally
Open and inspect a CSV with up to 10 million rows in your browser. Search, sort and check large datasets without uploading the file.
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Tools
How to correct a CSV and save the edited file
Open a CSV in TooLab's browser editor, find and fix incorrect values, remove duplicates, then download a corrected copy while keeping the original safe.
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Apps
How to edit an interview recording in your browser
Trim pauses, remove mistakes, join clips and export an interview as WAV or MP3 with TooLab's browser-based Audio Editor, without installing software.
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Apps
How to remove a photo background manually
Remove a photo background by tracing the subject, cleaning the edges, and exporting a transparent cutout in TooLab's browser-based Photo Editor.
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Tests
Why can't my browser show laptop battery data?
Learn why a browser may hide battery status, how to check whether your laptop still reports it, and what to try when the Battery Meter is missing.
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Tests
How to tell if a printer problem is ink or settings
Print a test page to see whether faded, streaky, or wrong-color output comes from ink, paper, print settings, or the printer itself.
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Tools
How to choose QR code colors that still scan
Choose QR code colors with enough contrast, keep a clear border, and test the code on phones before you print or share it for reliable scanning.
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Tests
Laptop loses charge while sleeping: what to check
Check how much charge your laptop loses overnight, separate normal sleep drain from a problem, and find the settings or hardware to check next.
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Games
How to test mouse polling rate in your browser
Check your mouse's polling rate in a browser, understand what the number means, and fix readings that are lower or less steady than expected.
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Tests
Why Wi-Fi bars can't tell you your real speed
Wi-Fi bars show a rough link to your router, not internet speed. Learn what to test instead and why signal strength and download speed can disagree.
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Tests
How to check each connected screen's resolution
See the resolution and scaling of every connected display, identify which screen is which, and set the right resolution in Windows 11 or macOS.