Runs in your browser. Nothing is uploaded.
Screen Info
Resolution, pixel ratio, browser, and the device details this browser is willing to share.
The list updates when you resize the window.
More tests
What it measures
Screen
CSS pixels, device pixels, color depth, and orientation.
Browser
Browser, system, language, time zone, and a few hardware hints the browser is willing to share.
Questions
Why is device memory missing?
Only some Chromium browsers expose it, and they round it. A dash means the browser kept that detail private.
Can I copy the list?
Yes. Copy details puts the same lines on the clipboard.