Monitor test
Show solid colours, a gradient, a grid and sharpness text on this screen to inspect it yourself, in your browser.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Monitor test
Pattern area: press Generate to show the first pattern here.
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
A 1920 by 1080 screen reports 2,073,600 pixels and steps through 8 patterns, starting with solid red.
What this tool does not do / Limits
This tool shows test patterns on the screen you are using right now, in this browser. It cannot test a different or remote monitor, and only your own eyes can judge dead pixels, bleed or sharpness.
Frequently asked questions
Can this test a monitor I do not have here?
No. Patterns only appear on the screen you open this page on.
How do I check for dead pixels?
Step through the solid colours and look for dots that stay dark or wrongly coloured on each one.
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