Gradient & banding inspection
Inspect continuous grayscale and color ramps for visible stepping.
Use normal display brightness and inspect ramps without zooming. Disable color filters when appropriate.
Enable JavaScript to run this interactive test. The guide and methodology below remain available.
How to run this check
Use normal display brightness and inspect ramps without zooming. Disable color filters when appropriate.
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
GPU output, browser compositing, panel depth and color settings can all introduce banding.
If something seems wrong
Compare another browser and image source. Check output bit depth in your graphics settings.
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.