Screen Test

Click Test your screen Switch solid colors and a grid pattern to find dead pixels, stuck pixels, and color issues fast.

Display check

Color & dead pixel test

Use solid colors and a grid to spot stuck or dead pixels.

Test modes

Colors

Full screen makes small defects easier to spot.

Check multiple brightness levels for uniformity.
Scan edges and corners for darker spots.
Use the grid mode to find stuck pixels quickly.

Live preview

Solid color view

Why run a screen test

A screen test helps you detect dead pixels, stuck pixels, uneven brightness, and color banding before you commit to a display or troubleshoot issues. It provides a fast visual check without installing any software.

How the test runs

The tool displays full‑screen solid colors and patterns in your browser. You switch between colors to inspect the panel, and the test ends when you leave the page.

How to interpret results

Dead pixels stay dark on bright colors, while stuck pixels show a fixed color. Uneven brightness appears as patches or gradients, and banding shows as visible steps in smooth color transitions. Use different colors to confirm whether the issue persists across the panel.

Dark dots on bright screens suggest dead pixels.
Fixed bright dots often indicate stuck pixels.
Patches or stripes can point to brightness or banding issues.

This test is visual only and does not calibrate color, fix pixels, or alter display settings.

Frequently Asked Questions

What is this screen test used for?

This screen test helps you spot dead pixels, stuck pixels, uneven brightness, and color banding. It fills the screen with solid colors and patterns for easier inspection.

How does the screen test work?

The test displays full-screen color fills and grids in your browser. You visually inspect the panel for anomalies.

How do I check for dead pixels?

Use solid colors like black, white, red, green, and blue. Dead pixels stay dark on bright colors.

What is the difference between dead and stuck pixels?

Dead pixels remain black on all colors. Stuck pixels show a single color and do not change.

How can I check for uneven brightness or color banding?

Use gray and gradient-like screens to look for patches or visible steps. Adjust brightness to see if banding changes.

Does this screen test work on mobile?

Yes, it works on mobile browsers. Use full screen and rotate the device to check uniformity.

Is the screen test safe for my display?

Yes, it only shows static colors and patterns. It does not change your device settings.

Can a screen test fix dead pixels?

No, it only helps you diagnose issues. Hardware fixes require service, and stuck pixels may or may not recover.

Can the screen test calibrate colors?

No, it does not calibrate your display. Calibration requires OS or hardware tools.

How do I check for OLED burn-in or image retention?

Use a mid-gray or solid color and look for faint ghosted shapes. Burn-in stays visible even when content changes.

Why does the screen test look different in another browser?

Browsers can apply different color management or scaling. Display settings and drivers also affect how colors appear.

What should I do for the most accurate screen test?

Go full screen, dim the room, and clean the display. These steps make subtle defects easier to see.