Has anyone used this display testing website? (displaytest.org)

Hi everyone,

I recently came across a website called DisplayTest.org, which seems to provide online tools for testing screens and monitors.

From what I understand, it allows users to run different types of display tests directly in the browser, such as checking for dead pixels, color accuracy, brightness uniformity, and other screen issues. These kinds of tools are often used to evaluate monitor quality or diagnose display problems.

Since everything runs in the browser, it looks convenient because there is no need to install software.

I’m curious if anyone here has tried this site before:

Is it accurate for detecting screen issues like dead pixels or color problems?

Are browser-based display tests generally reliable?

Do you prefer online tools like this, or dedicated monitor testing software?

Would love to hear your experience or recommendations.

Thanks!