Blog
Short, practical guides for checking your hardware and fixing what the tests find.
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Tests
Why does my keyboard type the same letter twice?
Find out whether a key is sticking, a repeat setting is too fast, or a connection is glitching, then follow simple checks to stop duplicate letters.
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Tests
Keyboard works in BIOS but not in Windows
If your keyboard works in BIOS but stops in Windows, test which keys register and work through the Windows settings, driver, USB, and app fixes.
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Tests
How to find a key that sometimes stops working
Test the key repeatedly, compare it with nearby keys, and narrow down whether a flaky keyboard key is caused by software, debris, or hardware.
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Tests
Laptop keyboard keys not working after a spill
A spill can damage a laptop keyboard even after the surface dries. Learn what to do first, then test which keys still register safely.
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Apps
How to add text to an image in your browser
Add a caption, label, or title to a picture in your browser. Learn how to place, style, and keep the text readable with TooLab Photo Editor.
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Tests
When does laptop overheating need repair?
Learn which heat and slowdown symptoms point to a repair, how to run a browser stress test safely, and when to stop using your laptop.
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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.