Monitor Screen Test
Check your monitor for dead pixels, backlight bleed, resolution issues, brightness problems, motion artifacts, and other visible display issues.
Workflow
Monitor Screen Check
Work through these checks in order, directly on the monitor you want to test. All tests run in your browser.
0 / 8 checked
Method
How to test your monitor
Clean the screen
Set the monitor to its normal display settings
Connect the monitor using the intended display connection
Run the tests fullscreen where possible
Inspect the entire panel, including edges and corners
Record anything unusual
If new or used, complete the checks before the seller's return period ends
What to look for
- Dead or stuck pixels
- Bright patches around edges
- Uneven gray or white areas
- Unexpected resolution or refresh-rate results
- Dark or bright details that disappear
- Motion trails or smearing
- Visible gradient bands
New vs used monitor
New monitor
Focus on dead pixels, backlight bleed, resolution, refresh rate, uniformity and obvious display defects.
Used monitor
Also check burn-in/image retention, brightness consistency, black level and motion performance.
Gaming monitor
Gaming monitors benefit from checking refresh rate, motion artifacts and screen tearing in addition to basic panel checks.
Explained
Monitor display problems explained
Pixels that stay dark or one fixed color on every background.
Unwanted light visible around the edges or corners on dark screens.
Whether one shade looks even from the center to the edges and corners.
How dark black and near-black shades appear on the display.
Faint trails or smears left behind moving objects.
Breaks where parts of a moving image appear out of alignment.
Smooth gradients appearing as visible steps or bands.
Faint persistent marks left by static content shown for a long time.
FAQ
Monitor Screen Test FAQ
01How do I test my monitor?
Open this page on the monitor itself and work through the eight checks in order, using fullscreen where possible.
02How do I check my monitor for dead pixels?
Open the dead pixel test in fullscreen and look for dots that stay dark, bright, or one fixed color on every background.
03How do I test a monitor for backlight bleed?
Show a full black screen in a dim room and look around the edges and corners for unwanted light.
04How do I check my monitor's resolution?
Open the resolution checker. It reports what your browser sees, which does not always equal the physical panel resolution.
05How do I check if my monitor is running at 144Hz?
Set 144Hz in your operating system display settings, then run the refresh rate test and compare the observed browser frame rate with 144Hz.
06How do I know if my monitor is working properly?
If all eight checks look normal, you may not see any obvious display problems. Browser tests cannot detect every hardware issue.
07How do I test a monitor before buying?
Run the full workflow on the monitor itself and check for anything unusual before the seller's return period ends.
08How do I test a used monitor?
Run the full workflow, then pay extra attention to image retention, brightness consistency, black level, and motion performance.
09Can I test my monitor without downloading anything?
Yes. Every check on this page runs directly in your browser with nothing to install.
10How do I test a gaming monitor?
Run the basic panel checks, then add the refresh rate, ghosting, and screen tearing tests for motion performance.
11How do I test my monitor for screen tearing?
Open the screen tearing test and watch the moving pattern for visible breaks or parts of the image that appear out of alignment.