SCREEN 📌 Quick Summary: A phone dead pixel test displays solid colors on your smartphone screen to reveal defective pixels. Our free online tool works on any phone — iPhone, Android, Samsung — and runs in your mobile browser in under 60 seconds.
Phone Dead Pixel Test — Free & Online
Smartphone screens are prone to dead pixels, especially AMOLED and OLED panels. Whether you have an iPhone, an Android device, or a Samsung Galaxy, our tool will help you identify dead, stuck, or malfunctioning pixels.
How to Test Your Phone for Dead Pixels
- Clean your phone screen — Use a microfiber cloth.
- Set your brightness to maximum — For accurate testing.
- Open this page on your phone — The test works on mobile.
- Tap "Start Full Diagnosis" — The test runs in fullscreen mode.
- Inspect each color — White, black, red, green, and blue.
- Document any defects — Take screenshots for warranty claims.
Which Phone Brands Can Be Tested?
- Apple — iPhone 15, 14, 13, 12, SE
- Samsung — Galaxy S24, S23, A-series, Z Fold, Z Flip
- Google — Pixel 8, 7, 6, 5
- Xiaomi — Mi, Redmi, POCO
- OnePlus — 12, 11, Nord
- Huawei — P-series, Mate-series
- Oppo — Find, Reno
- Vivo — X-series, V-series
Why Test Your Phone Screen?
Most phone manufacturers won't replace a screen for just 1-2 dead pixels. That's why it's crucial to test your phone within the return window — whether you just bought a new one or you're buying a used phone.
Phone Dead Pixel vs Stuck Pixel
Dead pixels appear as black dots that never light up. Stuck pixels stay on one color (red, green, blue, or white). Our phone test helps you identify both types.
Learn more: Dead Pixel vs Stuck Pixel: What's the Difference?
AMOLED Burn-In on Phones
AMOLED phone screens are also prone to burn-in — a permanent discoloration caused by static images (status bars, keyboards, etc.). Our tool includes a burn-in scan.
Learn more: What is Screen Burn-In? The Complete 2026 Guide