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Short, practical guides for checking your hardware and fixing what the tests find.

Apps How to change the color tone of a photo Warm up a cool photo, soften a color cast, or create a mood with TooLab's browser Photo Editor, then check that skin and whites still look natural. David MorganOctober 23, 20264 min read
Tools How to avoid calling a colleague outside office hours Check your colleague's local time before you call, account for daylight saving, and choose a safer time with TooLab's World Clock. Rachel BennettOctober 23, 20264 min read
Apps How to add a simple watermark to a photo Add a clear text watermark to a photo in TooLab Photo Editor. Choose its wording, placement, and size, then save a copy without changing the original. David MorganOctober 23, 20264 min read
Tools How to switch a world clock between 12 and 24 hours Choose 12-hour time with AM and PM or 24-hour time in TooLab's World Clock, and find out what to check if the display does not change. Emily ParkerOctober 23, 20263 min read
Tests How to test a used laptop for overheating Run a short browser stress test, watch for performance drops, fan noise, or shutdowns, and learn when a used laptop may need cleaning or repair. Ryan MitchellOctober 23, 20265 min read
Tools Why do cities in the same country have different times? Learn why cities in one country can show different times, how daylight saving changes the gap, and how to compare their local clocks correctly. Sarah CollinsOctober 23, 20264 min read
Tests How to detect CPU slowdown without temperature readings Find out whether your computer slows down under sustained load without a temperature readout, using a browser test and repeatable checks. Daniel HayesOctober 23, 20264 min read
Tests How to test whether laptop position affects cooling Compare the same laptop load on a desk, stand, and other positions to spot blocked airflow or heat-related slowdowns, without relying on touch alone. Michael ReedOctober 23, 20265 min read
Tests Hot laptop: clean it or add more RAM? A hot, slow laptop may need cooling, not more memory. Test for heat-related slowdowns and check whether RAM is really the limit before upgrading. Kevin DoyleOctober 23, 20265 min read
Tests Does reducing screen brightness save battery? Compare battery drain at different brightness levels, learn when dimming makes a noticeable difference, and separate screen use from other power loads. Ryan MitchellOctober 23, 20265 min read
Tests How to observe laptop battery drain during an online meeting Measure your laptop's battery before, during and after a video call. Learn how to read the drain rate and tell normal use from a battery issue. Kevin DoyleOctober 23, 20265 min read
Tests Why battery wear and current discharge rate differ Battery wear describes capacity lost over time, while discharge rate shows power use right now. Learn why they differ and how to check both. Daniel HayesOctober 23, 20265 min read