Monitor Test – Check Your Display Online

The Monitor Test on ZafScreen.com is a browser-based tool that helps you visually inspect different parts of your display using solid colors, grayscale patterns, gradients, contrast references, sharpness grids, and other screen patterns.

It is useful when a monitor looks slightly off but you are not sure why.

Maybe one color seems uneven. Maybe dark areas look strange. Or perhaps text and fine lines do not appear as sharp as expected. The ZafScreen online monitor test gives you several simple patterns to compare what you see.

The available test modes include White, Black, Red, Green, Blue, Gray, Grayscale, RGB Bars, Gradient, Vertical Gradient, Contrast, Sharpness, and Checkerboard.

Start with the White Monitor Test. A clean white screen can make dark spots, discoloration, dust, and uneven areas easier to notice. Then switch to black and the primary colors to inspect different parts of the panel.

The grayscale and gradient patterns can help you look for smooth tonal transitions. Ideally, shades should change gradually rather than jumping abruptly from one tone to another.

The Contrast pattern gives you another way to inspect dark and bright areas, while Sharpness can help reveal how clearly fine lines and small details appear.

There is also a Checkerboard pattern, which makes repeated light and dark areas easy to compare across the display.

You can select each test manually or click Start Auto Test to move through the available patterns automatically. The current setup includes 13 test modes with an automatic interval between patterns.

For the cleanest view, use Start Fullscreen Test.

One important thing: the Monitor Test is a visual inspection tool. It does not professionally calibrate or measure your display hardware. Browser settings, HDR, brightness, color profiles, viewing angle, panel type, and room lighting can all affect what you see.

So use it as a practical check, not a laboratory measurement.

How to Use the Monitor Test

1. Open the Monitor Test on ZafScreen.com.
2. Clean your screen before starting.
3. Click Start Fullscreen Test for a larger viewing area.
4. Begin with the White Monitor Test.
5. Check Black, Red, Green, Blue, and Gray.
6. Continue with Grayscale, RGB Bars, Gradient, and Vertical Gradient.
7. Use Contrast, Sharpness, and Checkerboard patterns for finer inspection.
8. Click Start Auto Test to cycle through all modes automatically.
9. Use Reset Test whenever you want to start again.

5 Useful Ways to Use the Monitor Test

1. Check a New Monitor – Give a new display a quick visual inspection after purchase.
2. Look for Color Problems – Compare red, green, blue, white, and gray areas for uneven appearance.
3. Check Gradients – Look for visible steps, bands, or abrupt tonal changes.
4. Inspect Sharpness – Review fine lines, patterns, and small details.
5. Compare Displays – Run the same patterns on two monitors, laptops, or other compatible screens.

Logos, Brand Names and Trademark Note

Any third-party logos, brand names, product names, trademarks, operating-system names, display technologies, or recognizable references that may appear elsewhere on ZafScreen.com remain the property of their respective owners.

They are used only for identification, informational, descriptive, comparison, or simulation purposes where applicable.

ZafScreen.com is not affiliated with, sponsored by, endorsed by, or officially connected with any monitor manufacturer, computer brand, electronics company, display technology provider, or other third-party company unless clearly stated otherwise.