Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tests
How to test a used laptop's storage performance
Check a used laptop's large-file and small-write speeds, understand the score, and spot signs that storage needs a closer look.
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Tools
How to convert HEX to RGB and HSL
Convert a HEX color to RGB and HSL by hand, understand the channel values, and check colors on your screen with TooLab's Color Picker.
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Tools
How to add a logo to a QR code without breaking it
Add a logo to a QR code safely. Learn how much of the code to cover, which colors scan reliably, and how to test it before sharing or printing.
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Tools
How to make a QR code for a website link
Create a QR code that opens your website, customize its color if you want, then test it with a phone before sharing or printing it.
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Tools
How to sort a large CSV file in your browser
Sort a large CSV file without installing software. Learn how to choose a column, check the order, and avoid common sorting mistakes.
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Apps
How to select and move an object in an image
Select an object with the right method, move it without shifting the rest of the photo, and clean up the gap left behind.
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Games
How to test a used gaming mouse before buying
Check a used gaming mouse for missed clicks, double-clicking, scroll problems and polling rate, then inspect its sensor, cable and wear before you pay.
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Tests
15-minute computer health check after a repair
Use TooLab's Test Everything to check the parts affected by a repair, catch obvious problems, and decide what needs a closer look before you leave.
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Tests
How to test a used laptop before buying it
Run browser-based checks on a used laptop’s screen, keys, battery and performance, then spot warning signs before you hand over money.
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Tools
Make a QR code for Wi-Fi guests
Create a Wi-Fi QR code guests can scan to join your network, choose the right security type, and test it before you print or share it.
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Tests
Why does my laptop get slow when it gets hot?
Learn why heat can slow a laptop, how to check for thermal throttling with a browser test, and what to do before dust or a failing fan causes damage.
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Tests
Is my USB flash drive fake? How to check its real size
Check whether a USB flash drive is falsely reporting its capacity, verify how much data it can really store, and tell fake size from slow speed.