About Dead Pixel Test
Empowering display buyers, gamers, and technicians with rapid, client-side browser diagnostic utilities.
Our Mission
When purchasing a new desktop monitor, gaming display, laptop, or secondhand device, users face tight 14 to 30-day return windows. Undetected subpixel defects, backlight bleed, or refresh rate scaling issues discovered after the return window expires can cost hundreds of dollars in unfulfilled warranty claims.
Dead Pixel Test was engineered to provide a 100% client-side, zero-dependency suite of visual and hardware tests that anyone can run in under 30 seconds without installing third-party software or drivers.
1. New Device Buyers
Inspect brand new laptops and monitors immediately upon unboxing to request store exchanges before return windows close.
2. Secondhand Buyers
Test hardware on-the-spot during face-to-face marketplace transactions (Craigslist, Facebook Marketplace, eBay pickups).
3. IT Technicians
Conduct rapid multi-device quality control audits with automated testing slides and printable screen inspection reports.
Testing Methodology & ISO 9241-307 Standards
Dead Pixel Test builds its diagnostic criteria around the internationally recognized ISO 9241-307 standard for flat-panel display ergonomics and pixel fault classification. Our tests utilize pure RGBW color subpixel excitation, high-frequency canvas stimulation, and high-precision browser animation loops to deliver empirical measurements.
Technical & Privacy Philosophy
Zero Telemetry: We believe diagnostics should be private and client-side. No tracking cookies, no heavy framework runtimes, and no physical downloads. All tests execute 100% in your device's browser memory.
Testing Limitations: Browser checks are diagnostic aids. They do not replace optical colorimeter devices, manufacturer oscilloscope analysis, or factory hardware warranties.