Find dead and stuck pixels online
Cycle clean color fields to separate a dark dead pixel from a bright or single-color stuck sub-pixel.
A practical visual check for every display
Run a focused screen check with solid colors, gradients, geometry patterns, and motion tests.
How to Run a Screen Test
Use Left / Up to go back, and Right / Down or Space to continue.
Move the pointer to the bottom edge during a fullscreen check to reveal the controls.
When the final pattern is reached, the next action closes the test view.
Select any pattern to open it fullscreen.
Display Information
Screen Resolution-- × --
Device Pixel Ratio1.0
Color Depth24 bit
Pixel Depth24 bit
Solid color monitor test for dead pixels
Scan bright, dark, and stuck pixels while checking panel uniformity
Gradient test for color banding and gamma
Reveal stepped tones, clipped highlights, and uneven transitions
Screen pattern test for sharpness and alignment
Check geometry, text clarity, scaling, and pixel alignment
What this online monitor screen tester checks
Practical display checks for clean color fields, fast comparisons, motion review, and a calm fullscreen workflow.
Check native resolution and pixel mapping
Use fine grids and text samples to confirm that your display maps detail at its native size.
Inspect screen uniformity in fullscreen
Compare the corners, edges, and center of the panel in one unobstructed view.
When to run a screen test for your monitor or phone
One set of patterns for buying, setting up, editing on, and enjoying a display.
Test a new monitor before the return window
PopularRun a repeatable pixel, tint, and uniformity sweep before accepting a new display.
Check a phone or tablet screen for damage
Use pure colors to reveal uneven brightness, tint, pressure marks, or pixels that do not respond.
Verify display color before editing
ProCompare channel ramps and neutral grays before color grading, design work, or a client review.
Test monitor ghosting for gaming
Use moving blocks and scrolling patterns to spot trails, judder, tearing, and overshoot.
Screen tester questions: pixels, uniformity, and ghosting
Short answers for getting a reliable result from your display check.
How do I test a monitor for dead pixels at home?
Open the solid color tests, enter fullscreen, and slowly scan the panel on black, white, red, green, and blue. Document any dot that stays dark, bright, or one color.
Can an online screen test measure display quality?
It can reveal visible pixel defects, tint, banding, geometry errors, and motion artifacts. It cannot replace instrument-based color measurement or repair hardware.
What is the best way to check screen uniformity?
Let the panel warm up, disable adaptive brightness and night filters, use the native resolution, and inspect gray fields in a dim room.
Does this test work on phones, laptops, and TVs?
Yes. Modern browsers can open every pattern on phones, tablets, laptops, monitors, and televisions. Fullscreen mode and native resolution give the most reliable result.