About DeadPixelTest.pro

It started with a MacBook. A few months after getting it, a small dark dot appeared near the centre of the screen — barely noticeable at first, impossible to ignore once spotted. The usual questions followed: is it a dead pixel or just dust? Is it covered under warranty? Will it spread? How do I even prove it is there?

Finding a decent answer online was surprisingly difficult. Most tools were outdated, ad-heavy, or simply did not work well on a Retina display. Warranty forums gave contradictory advice. A few sites ran JavaScript that flashed colors aggressively with no explanation of what to look for. It felt like the kind of problem that should have a clean, obvious solution — and did not.

After getting the MacBook screen replaced, the experience stuck. Then a friend bought a new monitor and asked how to check it before the return window closed. Then another friend had a stuck pixel on a brand-new phone and did not know whether it was worth contacting the manufacturer. The same set of questions, the same lack of a straightforward answer, over and over again.

That is when it became clear this was worth building properly — a tool that anyone anywhere in the world could open, use immediately without signing up or downloading anything, and trust to give them an honest result. No fake "your screen has dead pixels" scare messages. No dark patterns. Just a clean full-screen color test and the information needed to act on what you find.

DeadPixelTest.pro now covers monitors, phones, laptops, tablets, and TVs. It works on every resolution from 1080p to 4K, on every major browser, and on mobile with no app required. The fix tool handles stuck pixels. The warranty guide explains exactly what to say to each manufacturer. Everything is free.

If it has helped you check a new screen, catch a defect before a return window closed, or save you the cost of a repair — that is the whole point.