Useful first
Interactive fields appear before long explanations on test pages. Each guide answers a separate practical question.
Purpose, method, boundaries
About DeadPixelTestPro.org
DeadPixelTestPro.org provides focused browser tools and plain technical guidance for visual screen checks. The first release centers on dead and stuck pixel observations without pretending a webpage can read panel electronics.
Local by design
The tools do not request a camera, microphone, upload, screen capture, account, or hardware identifier.
Technically bounded
Copy distinguishes what you see, what a browser can estimate, and what requires hardware measurement or policy review.
Static and inspectable
Pages are generated as static HTML, with JavaScript reserved for the controls, fullscreen behavior, and local helpers.
Why this site exists
A solid-color screen is simple; a trustworthy inspection workflow is not. Users need to know where to look, why black and white reveal different behavior, how RGB channels relate to a colored point, and when a larger patch belongs to uniformity or backlight language instead. This site combines the field with those boundaries in one place.
How the tools are designed
The test components set ordinary browser CSS colors and patterns. Fullscreen begins only after you press its button. Keyboard, touch, and visible controls change the field; conservative auto cycling pauses when the tab is hidden and slows to five seconds when reduced motion is requested. The post-test helpers classify only the observation you choose. They do not analyze a screenshot or inspect the display.
How content is checked
Public explanations are reviewed against the actual implemented capability. Terms such as pixel, subpixel, RGB channel, backlight uniformity, IPS glow, local dimming, image retention, and burn-in are used only where they clarify an observation. We avoid invented performance claims, universal warranty thresholds, physical manipulation advice, and promises that visual patterns repair hardware.
Independence
DeadPixelTestPro.org is not presented as a laboratory, certification body, manufacturer service, retailer, or standards organization. It does not imply affiliation with device brands, GPU vendors, panel makers, or browser developers. Product support and warranty decisions remain with the relevant provider.