Screen Aspect Ratio & Resolution Check

Use this when content looks stretched, cropped or displayed at an unexpected size.

No accountLocal where possibleRetest anytime

Screen — · viewport —

CSS screen—

Viewport—

Pixel ratio—

Refresh estimate—

DeviceOK can display patterns and estimate browser frame timing, but visual panel defects still require your inspection and professional measurements require dedicated hardware.

Private by design

Screen dimensions are read locally from browser APIs.

What this tells you

Use the result as evidence, not a guess.

This test checks

Screen dimensions
Viewport dimensions
Device pixel ratio

How to read it

Browser-reported CSS dimensions can differ from physical panel pixels because of scaling.

Use OS/display settings for the panel's native mode.