Monitor Dead Pixel Test

Inspect dead, hot, and stuck pixels in pure fullscreen color, and check panel ghosting/burn-in with a sweeping white stripe.

Inspection Guide

•Clicking start or a color preset automatically enters borderless fullscreen, hiding all browser tabs, address bars, and taskbars.
•Zero overlays or controls are displayed during the test so every pixel on your display is unobstructed.
•Click the screen or press Space / Arrow keys (→, ↓) to cycle colors. (Left Arrow or Right-click goes to the previous color).
•To exit the test at any time, press the ESC key or double-click anywhere on the screen.
•View the screen head-on from 30 to 50 cm away. Clean your display before testing so dust isn't mistaken for a dead pixel.
•In ghosting/burn-in mode, a thick white vertical stripe sweeps from left to right across a black background to check pixel response time and retention.

In restricted browser environments (such as some in-app webviews), an edge-to-edge overlay replaces native fullscreen. Criteria vary by manufacturer; verify your warranty policy before requesting a replacement.

About this Tool

Monitor Dead Pixel Test is a 100% free online screen testing utility that displays full-screen solid colors (White, Black, Red, Green, Blue, Gray) and contrast gradient patterns. It allows you to quickly and accurately detect dead pixels, stuck pixels, subpixel defects, backlight bleeding, screen clouding, and burn-in image retention on desktop monitors, laptops, tablets, and smartphones without installing any software or registering an account.

Processed safely on your device

Everything happens in your browser on this device. Your files are never sent to our servers—so you can use it with peace of mind.

How to Use

Clean your screen gently with a microfiber cloth before testing to remove dust and surface smudges.

Click the 'Start Dead Pixel Test' button or choose any color preset card to enter full-screen testing mode.

Click anywhere on the screen, press Space, or use the Left/Right Arrow keys to cycle through the 6 core color presets.

Inspect for black spots on the white background (dead pixels), glowing colored dots on black (stuck pixels), and color subpixel failures on Red/Green/Blue, then press ESC to exit.

Key Scenarios & Use Cases

New Monitor and Laptop Inspection

Check your brand new display right out of the box to verify zero-defect warranty claims and dead pixel exchange policies within the return window.

Used Monitor Purchases and In-Person Testing

Quickly verify display panels in front of the seller by simply opening this browser tool on any laptop or desktop with no setup required.

OLED & IPS Backlight Bleed and Burn-in Check

Examine backlight uniformity on dark screens and check for permanent burn-in ghosting artifacts using high-contrast test patterns.

Frequently Asked Questions (FAQ)

A dead pixel is permanently turned off and appears as a black dot even on a pure white screen. A stuck pixel has one or more subpixels permanently energized, glowing red, green, blue, or white against dark backgrounds.

Zero-bright-dot (ZBD) warranty models typically qualify for replacement with 1 stuck pixel or 2-3 dead pixels. Standard consumer panels often require 5 or more defects or defects clustered in the central viewing area.

Yes. On mobile browsers that restrict full-screen mode, it automatically switches to an edge-to-edge overlay view with touch-to-advance and an easy-to-tap close button in the top-right corner.