SCREEN 📌 Quick Summary: A dead pixel checker is a free online tool that displays solid colors on your screen to help you identify dead, stuck, or malfunctioning pixels. Our checker runs in your browser in under 60 seconds — no downloads, no signups.
What is a Dead Pixel Checker?
A dead pixel checker is a diagnostic tool that displays solid colors (white, black, red, green, blue) on your screen to reveal defective pixels. A dead pixel appears as a tiny black dot that never lights up, while a stuck pixel stays on a single color.
Our free online dead pixel checker is designed to be fast, private, and easy to use. It runs entirely in your browser — no data is ever uploaded to our servers.
How to Check Your Screen for Dead Pixels
- Clean your screen first — Dust and fingerprints can mimic dead pixels.
- Click "Start Full Diagnosis" — The checker will run in fullscreen mode.
- Inspect each color — Look for any dots that don't match the background.
- Document any defects — Take photos if you plan to return the device.
Why Use Our Dead Pixel Checker?
- ✅ 100% Free — No hidden fees, no premium tiers
- ✅ 100% Private — Everything runs in your browser
- ✅ Works Everywhere — Monitors, laptops, phones, TVs, tablets
- ✅ No Downloads — No software to install
- ✅ Fast — Complete the check in under 60 seconds
Dead Pixel Checker vs Dead Pixel Test
The terms "dead pixel checker" and "dead pixel test" are often used interchangeably. Both refer to the same process: displaying solid colors to identify defective pixels. Our tool does both — it checks and tests your screen.
Which Devices Can Be Checked?
Our online dead pixel checker works on any device with a modern web browser:
- Monitors — LCD, LED, OLED, 4K, 144Hz
- Laptops — Windows, MacBook, Chromebook
- Phones — iPhone, Android, Samsung
- TVs — Smart TVs with a browser
- Tablets — iPad, Android tablets
Related Guides
Learn more about dead pixels and screen health: