PREPARE
Before you start
- 1Use the browser window you want to inspect.
- 2Note your operating-system scaling.
- 3Resize to compare viewport values.
DISPLAY · Instant
Screen Resolution Checker
See CSS screen size, viewport, DPR, color depth and estimated device pixels.
Screen CSS sizeDetecting…
Available screen—
ViewportDetecting…
Device pixel ratio—
Estimated device pixels—
Color depth—
Orientation—
Refresh estimateSampling…
Estimated device pixels are calculated from CSS screen size × DPR. They are not labeled as native panel resolution.
OBSERVE
What to look for
- Expected CSS screen and viewport dimensions.
- A DPR consistent with system scaling.
- Orientation and available-space changes.
MEASUREMENT BOUNDARY
What this test cannot prove
CSS size × DPR is an estimate and must not be treated as the panel’s native resolution.