Tier A - Direct Browser Interaction Ready

Screen Orientation & Rotation Angle Checker

Test screen orientation changes (portrait vs landscape) and angle rotation detection. Monitors screen.orientation API and viewport aspect ratios to verify whether your device detects orientation shifts between portrait and landscape.

Screen Orientation & Rotation Lab

Landscape (0°)

0°
Primary

Orientation Type:

Rotation Angle:

Lock API Support:

How to use this test

Rotate your phone, tablet, or convertible laptop 90 degrees.
Observe real-time angle badge and orientation mode update.
Confirm that viewport dimensions invert appropriately.

How to understand your result

Looks good: Orientation events fired accurately when rotating device.

Troubleshooting: what to try next

On mobile devices, ensure 'Auto-Rotate' is not locked in portrait mode in quick settings.

What this test cannot tell you

Desktop browsers simulate orientation via viewport aspect ratio when sensors are absent.

Frequently Asked Questions

Why does desktop PC always say Landscape Primary? +

Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]

Last Reviewed: 2026-10-17 • Test Method: screen.orientation change event listener and media query tracking • How We Test