Online Monitor Test - Pixels, Bleed, Color and Motion
Run a free online monitor test for dead pixels, backlight bleed, screen uniformity, display color, refresh rate and ghosting. No download required.
Quick answer
A monitor test combines solid colors, dark screens, gradients and moving patterns to check dead pixels, backlight bleed, uniformity, color banding, refresh behavior and ghosting.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Set the monitor to its native resolution, normal refresh rate and usual brightness.
- Clean the panel, then run black, white, RGB and gray screens fullscreen.
- Continue with gradient, refresh rate and ghosting tests if the first pass reveals a problem.
- Record repeatable defects before a return, warranty claim or repair visit.
What to watch for
- Fixed black or bright dots that stay in the same location across colors.
- Edge light, cloudy dark areas or uneven gray and white fields.
- Abrupt color bands, motion trails, inverse ghosting or an unexpected refresh rate.
- Problems visible at normal settings, viewing distance and everyday content.
How to interpret results
Fixed dot
Repeat the dead pixel test after cleaning and compare the same location on several colors.
Uneven panel
Use the backlight bleed and screen uniformity tests to separate edge light from broad brightness variation.
Motion problem
Confirm refresh rate, cable and monitor overdrive settings before assuming the panel is defective.
Frequently asked questions
What should a new monitor test include?
Check pixels, black and gray uniformity, colors, gradients, refresh rate and motion before the return window closes.
Can this test certify a monitor?
No. It is a visual browser workflow for finding and documenting symptoms, not laboratory certification.