Screen information
Read screen and viewport dimensions, pixel ratio and orientation.
Read the values at your current zoom, then resize or enter fullscreen and refresh the readout.
Enable JavaScript to run this interactive test. The guide and methodology below remain available.
How to run this check
Read the values at your current zoom, then resize or enter fullscreen and refresh the readout.
Understand the result
PASS describes a received signal or your recorded observation. WARNING calls for another check. USER REVIEW REQUIRED means a measurement alone cannot decide. An unavailable API or denied permission does not establish hardware failure.
What this cannot tell you
Screen and viewport values are CSS pixels. Multiplying by device pixel ratio does not guarantee physical panel resolution.
If something seems wrong
Check OS display settings for native resolution. Browser zoom and scaling affect reported values.
Find troubleshooting help →Good to know
Is anything uploaded?
Raw diagnostic input and media are processed locally. Results remain in this page’s memory until you download a report or leave. Hosting requests still reach the site host. See the privacy policy.
Does a pass guarantee my hardware is healthy?
No. It records behavior observed in this browser session. Intermittent faults, internal components and operating-system restrictions need further investigation. See our methodology.