system test
Fullscreen Test
Use this when games, video players, presentations, or display tests refuse to enter fullscreen.
No accountLocal where possibleRetest anytime
Browser & device environment
Ready
DeviceOK reports only information your browser intentionally exposes. It does not fingerprint hidden hardware or claim access to protected system details.
Private by design
No device data leaves the browser.
Use the result as evidence, not a guess.
This test checks
- Fullscreen API availability
- User-gesture fullscreen request
How to read it
A successful test proves fullscreen works for DeviceOK in this browsing context.
Embedded frames, browser policies, or a particular app can still restrict fullscreen independently.