Online dead pixel and stuck pixel check
Cycle through clean black, white, and primary-color screens to separate dark pixels, bright pixels, and sub-pixels that stay on.
Online screen tester for dead pixels, color accuracy, and monitor ghosting
Inspect a display in your browser with pixel, grayscale, sharpness, and motion checks.
How to run an online monitor test
Choose a solid color first, then use Left / Up to revisit a pattern or Right / Down and Space to advance.
Move the pointer to the bottom edge in fullscreen to show the controls.
Continue after the final pattern to close fullscreen.
Pick a pattern and inspect it at native size.
Display Information
Screen Resolution-- × --
Device Pixel Ratio1.0
Color Depth24 bit
Pixel Depth24 bit
Solid color dead pixel test
Find bright, dark, or stuck pixels and uneven panel lighting
Gradient banding and gamma test
Reveal posterization, clipped highlights, and broken tone transitions
Display sharpness and motion test
Check geometry, pixel alignment, text clarity, ghosting, and refresh behavior
What this online screen tester helps you verify
Check pixel defects, sharpness, and motion with one pattern set.
Monitor resolution and sharpness test
Use native-size grids, lines, and text samples to confirm that your display is showing fine detail without scaling blur.
Fullscreen screen uniformity review
Open one pattern at a time with the browser chrome out of the way, then scan corners and edges for tint or brightness drift.
When to use a monitor dead pixel and ghosting test
Use it when buying hardware, tuning a phone, preparing color work, or troubleshooting games.
New monitor dead pixel inspection
PopularRun a five-minute pixel, tint, and uniformity sweep before you accept a new monitor or television.
Phone and tablet display check
Fill a mobile screen with simple colors to reveal uneven brightness, color casts, pressure marks, or damage.
Color accuracy preflight for creators
ProCompare neutral grays, channel ramps, and saturation steps before a photo, design, or video session.
Gaming monitor ghosting test
Use moving patterns to notice response trails, overshoot, judder, and tearing before you tune game settings.
Online screen test questions and practical answers
Learn what each pattern shows and how to prepare your display.
What does this online screen test actually check?
It combines dead-pixel checks, color-channel screens, gray uniformity, gradient banding, geometry, text sharpness, and motion patterns in one browser tool.
Can a browser screen tester damage my monitor?
No. The page only displays test images locally and never changes firmware, brightness settings, or operating-system configuration.
What is the best way to test a new monitor for defects?
Let the panel warm up, select its native resolution, disable adaptive brightness, and inspect black, white, red, green, blue, and gray screens.
Does the display test work on phones and televisions?
Yes. It runs on modern phones, tablets, monitors, and TVs. Fullscreen mode is recommended for edge and motion checks.