ToolsFree browser-based screen test

Mobile Screen Test

An eight-step phone and tablet inspection for pixels, touch, burn-in, brightness, flicker, tone, and color.

Device guides
Test workspace

Use every mode and inspect the entire panel, including corners and edges.

Completed 0 of 8 checks
  1. Step 1 of 8

    Resolution Checker

    Read viewport size, screen pixels, device pixel ratio, color depth, orientation, and measured browser refresh rate.

    Start this check
  2. Step 2 of 8

    Dead Pixel Test

    Cycle full-screen colors and custom fields to find stuck, dead, bright, or dim pixels across the panel.

    Start this check
  3. Step 3 of 8

    Touch Screen Test

    Measure active touch points, draw continuous trails, and scan an edge-to-edge grid for inaccurate or unresponsive areas.

    Start this check
  4. Step 4 of 8

    Burn-In Test

    Run solid colors, moving bars, checkerboards, and gradient sweeps to reveal image retention or uneven pixel aging.

    Start this check
  5. Step 5 of 8

    Greyscale Test

    Adjust 4 to 64 gray levels and inspect full-range blocks, shadow detail, highlights, and uniformity.

    Start this check
  6. Step 6 of 8

    Brightness Test

    Adjust luminance patterns, inspect nine zones, and compare tone steps for range and uniformity problems.

    Start this check
  7. Step 7 of 8

    Flicker Test

    Show steady and striped brightness patterns that make PWM flicker easier to detect with a camera or peripheral vision.

    Start this check
  8. Step 8 of 8

    Color Accuracy Test

    Compare reference patches, neutral gray ramps, and saturation steps for obvious hue, balance, and clipping errors.

    Start this check
How to use this test

A repeatable process gives more useful results than a quick glance.

01

Prepare the display

Clean the screen, use the device's native resolution, and let brightness stabilize before running Mobile Screen Test.

02

Scan methodically

Run every available mode. Move your eyes across the center, edges, and corners instead of staring at one point.

03

Confirm the result

Repeat suspicious patterns at two brightness levels and compare with another display when possible.

What the result can tell you

Mobile Screen Test

This guided sequence covers the most common display faults for this device class and keeps the checks in a useful inspection order.

Testing notes

Disable night-light, color filters, and automatic brightness while comparing colors or tones.

Use a dim room for dark patterns and normal ambient light for color and brightness checks.

Stop flashing or high-contrast motion tests immediately if they cause discomfort.

Related tests

Device information

Resolution Checker

Read viewport size, screen pixels, device pixel ratio, color depth, orientation, and measured browser refresh rate.

Panel tests

Dead Pixel Test

Cycle full-screen colors and custom fields to find stuck, dead, bright, or dim pixels across the panel.

Device information

Touch Screen Test

Measure active touch points, draw continuous trails, and scan an edge-to-edge grid for inaccurate or unresponsive areas.

Panel tests

Burn-In Test

Run solid colors, moving bars, checkerboards, and gradient sweeps to reveal image retention or uneven pixel aging.

Frequently asked questions

Can this test prove that my screen is defective?+

It can reveal visible symptoms and help you reproduce them, but warranty decisions should be based on the manufacturer's policy and, when needed, instrument measurements.

Are any test results uploaded?+

No. Patterns, calculations, touch trails, and browser measurements run locally in this tab.

Why does the result change with brightness or viewing angle?+

Panel technology, local dimming, tone mapping, viewing angle, ambient light, and automatic display controls can all change what you see.