Phone Display Test — Complete Screen Diagnostic
Free all-in-one phone display diagnostic tool. Test for dead and stuck pixels, touch screen dead zones and latency, backlight bleed, OLED burn-in, color accuracy, and screen uniformity. Includes a stuck pixel repair tool, touch heatmap, health score, and PDF report. Works entirely in your browser — nothing is uploaded.
Check your phone for dead pixels, touch issues, backlight bleed, and OLED burn-in — free and private
Features
How to Test Your Phone Screen
- Prepare your device. Set brightness to maximum, disable auto-brightness, and lock screen orientation.
- Run each test. Go through each tab: Dead Pixels, Touch Screen, Backlight, Burn-in, Color, Patterns. Tap to mark defects.
- Review health score. Check your overall screen health score and per-test results in the dashboard below.
- Download report. Generate a PDF report with device info, defect map, touch heatmap, and all test results.
Frequently Asked Questions
What is a dead pixel vs a stuck pixel?
A dead pixel is permanently off (appears black). A stuck pixel is stuck on one color — red, green, or blue. Dead pixels usually cannot be fixed with software. Stuck pixels can often be repaired with the built-in rapid color cycling repair tool.
How do I test for OLED burn-in?
Go to the Burn-in tab and display a solid grey screen. Look for faint ghost images of your status bar, keyboard, or frequently-used app icons. Burn-in appears as permanent shadows and is most visible on mid-grey backgrounds.
What is backlight bleed?
Backlight bleed is light leaking from the edges or corners of an LCD screen, visible on dark backgrounds in a dark room. Some bleed is normal on LCD panels, but excessive bleed may indicate a manufacturing defect.
How does the touch screen test work?
The touch grid divides your screen into cells. Touch every cell to verify the entire screen responds. Untouched cells are potential dead zones. The multi-touch test shows how many simultaneous touches your screen supports.
Can the repair tool fix my screen?
The repair tool rapidly cycles colors at 60 frames per second, which can fix stuck pixels in approximately 60% of cases. Position the repair window over the stuck pixel and run for 10–20 minutes. Dead pixels (permanently black) cannot be fixed with software.
Is my data sent anywhere?
No. All tests run entirely in your browser using JavaScript. No screenshots, touch coordinates, or test results are sent to any server. Your privacy is fully protected.
