A single unusual pixel
Clean the glass and view the same point on several solid colors. A speck that stays visible with the screen off may be on the glass; a pixel issue changes with the displayed pattern.
Display
Browser-basedDisplay Test for Pixels and Screen Problems
Open solid colors, gradients, and neutral grays in full screen to visually inspect pixels, uniformity, discoloration, and possible image retention.
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What this result means
- Browser observedThe page records a signal or capability the browser received.
- You confirmedYou decide whether the physical response looks, sounds, or works as expected.
- Browser cannot verifyComplete hardware health, hidden or intermittent faults, or manufacturer certification.
Set brightness manually
Choose a comfortable system brightness before starting. You may increase it during inspection, but avoid uncomfortable brightness. Browsers cannot reliably control the phone’s real display brightness.
Dead/stuck pixel inspection
Use exact solid colors to look for dots, lines, patches, or pixels that differ from their neighbors.
Gradient inspection
Look for abrupt jumps, unusual bands, patches, or uneven transitions.
Uniformity / burn-in inspection
Use neutral grays to look for tint differences, uneven brightness, retention, or burn-in-like shapes.
Your visual result
0 of 10 patterns viewed
Viewing patterns never creates an automatic pass. Save only what you personally observed.
Privacy: No account, upload, screenshot, or display capture is used. Only your user-confirmed inspection result is stored locally.
Limitations: Browser rendering, display processing, panel technology, viewing angle, brightness, color management, compression, and accessibility settings can influence what you see.
This visual browser test cannot read individual physical panel pixels, automatically identify a dead pixel, diagnose OLED/LCD hardware, measure calibrated color accuracy or nits, or guarantee the absence of burn-in or intermittent defects.
Pattern 1 of 10
Pure white
Look for discoloration, dim areas, abnormal tint, dots, lines, or unusual patches.
Tap the screen to change pattern.
Interactive helper
What did you see on the screen?
Pick the closest visual symptom for the next useful pattern or comparison.
A dot stays in one place
Clean the glass and compare the same spot on red, green, blue, white, and black patterns before recording a concern.
Repeat color patternsA faint image remains
Compare gray and solid colors at comfortable brightness. Browser patterns help you look, but the judgment remains visual.
Open retention guideColor or brightness looks uneven
Use neutral gray and white in portrait and landscape. Viewing angle and automatic brightness can change what you see.
Repeat display inspectionTest guidance
How to read a phone display test
Shadows or uneven color
Use neutral gray and solid white at a comfortable brightness. A shape that remains in the same place across several patterns can be consistent with image retention or panel non-uniformity.
What this cannot measure
These patterns help with visual inspection, but they do not calibrate color accuracy, measure brightness, or confirm whether the panel meets a manufacturer specification.
A browser test is one part of a phone inspection. Repeat an unexpected result and combine it with ordinary real-world use before deciding that hardware needs repair.