Free Online Screen Test – Free Dead Pixel, Stuck Pixel & Monitor Diagnostic Tool
Test your monitor, laptop, or mobile display instantly with our free online screen test tool. Whether you just unboxed a brand-new OLED gaming monitor, bought a refurbished MacBook, or noticed an annoying faint dot on your daily work setup, a quick display diagnostic ensures your panel performs at its absolute best.
Free Screen Test Tool — Dead Pixels, Burn-In & Backlight Bleed | DigitalHackingTips
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DigitalHackingTips · Display Diagnostics
Test your screen before it tests you.
A free, in-browser diagnostic bench for laptops, monitors, TVs and phones. Run it on a brand-new display before the return window closes, or on an old one before you blame the wrong thing.
Dead pixelsStuck pixelsLine defectsIPS glowBurn-inColor uniformityBacklight bleed
Test bench
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Screen Test · DigitalHackingTips
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Professional Free Online Screen Tests Tool
Test your laptop, monitor, smartphone, or TV using professional display diagnostics. Detect dead pixels, stuck pixels, screen lines, IPS glow, backlight bleed, OLED burn-in, and color uniformity issues instantly, right in your browser, with no software to install.
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Why Choose Our Screen Test Tool?
Our free online Screen Test Tool helps you quickly identify common display issues with professional fullscreen diagnostics. It works directly in your browser, requires no installation, and supports laptops, monitors, TVs, smartphones, and tablets.
Works in all modern web browsers
Fullscreen testing for accurate inspection
Supports laptops, monitors, TVs, phones, and tablets
Fast, lightweight, and easy to use for beginners and professionals
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How to Use Our Free Online Screen Test Tool
Follow these simple steps to check your laptop, monitor, TV, or smartphone for dead pixels, screen lines, backlight bleed, IPS glow, and other common display issues.
Open the Screen Test Tool
Launch the tool in your web browser and select the display test you want to run, such as Dead Pixel Test, Line Test, or Color Test.
Enter Fullscreen Mode
Press F11 (or use the full screen button) to remove browser distractions and inspect every corner of your display accurately.
Run the Selected Test
Switch between colors and test patterns using your keyboard or on-screen controls to examine your screen carefully.
Inspect Your Display
Look closely for dead pixels, stuck pixels, screen lines, backlight bleed, IPS glow, color shifts, or uneven brightness.
Compare Your Results
Use the findings to determine whether the issue is normal, requires troubleshooting, or may qualify for warranty replacement.
Try Additional Tests
Run other diagnostic tests to check color accuracy, grayscale, burn-in, refresh rate, and screen uniformity for a complete display health check.
Core Free Online Screen Testing Tools
Our browser-based Screen Test Tool includes professional display diagnostics to help you detect dead pixels, stuck pixels, screen defects, color issues, and other common display problems. Choose a test below and inspect your screen with fullscreen precision.
Detect dead pixels that remain permanently black and stuck pixels locked on red, green, or blue. Fullscreen solid-color patterns make it easy to inspect every pixel on laptops, monitors, TVs, and smartphones.
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Use precision vertical and horizontal line patterns to identify dead rows, dead columns, display artifacts, and line-related panel issues that may indicate LCD or OLED hardware problems.
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Evaluate color accuracy, grayscale performance, gradient smoothness, brightness consistency, and screen uniformity to identify banding, color shifts, and uneven illumination.
Inspect your display in a dark environment to distinguish normal IPS glow from excessive backlight bleed. This test helps identify unwanted light leakage around the edges and corners of LCD panels.
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Check OLED and AMOLED displays for permanent image retention and burn-in caused by static interface elements or prolonged screen usage. This test helps identify ghost images and persistent display artifacts.
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Inspect grayscale transitions to identify color banding, gamma inconsistencies, shadow crushing, and highlight clipping. This test helps evaluate tonal accuracy and smooth brightness gradients across your display.
Verify your monitor's refresh rate and motion performance. This test helps confirm whether your display is operating at its intended refresh rate and can reveal frame skipping, motion stuttering, or display configuration issues.
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Check image sharpness, text clarity, and edge definition using high-contrast patterns. This test helps detect scaling issues, incorrect display resolution, oversharpening, and blurry rendering caused by improper settings.
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Evaluate local dimming performance by identifying blooming or halo effects around bright objects on dark backgrounds. This test is especially useful for Mini-LED and Full-Array Local Dimming (FALD) displays.
Frequently Asked Questions
Find answers to commonly asked questions about our free online screen testing tool.
Yes. Our Screen Test Tool runs entirely in your web browser, so there's no need to install software or create an account. Simply open the tool, enter fullscreen mode, and start testing your display.
Yes. The tool is compatible with smartphones, tablets, laptops, desktop monitors, and TVs. It works on most modern browsers, allowing you to check your display from virtually any device.
Yes. The Dead Pixel and Stuck Pixel tests display solid full screen colors that make defective pixels easier to spot. These tests help identify pixels that remain permanently off or fixed on a single color.
Yes. All screen tests are completely free and run directly in your browser. There are no downloads, subscriptions, or hidden fees, making it easy to check your display anytime.
A healthy laptop screen should display uniform colors, sharp text, smooth gradients, and no visible defects. Use our Screen Test Tool to check for dead or stuck pixels, screen lines, uneven brightness, color shifts, IPS glow, backlight bleed, and other display issues. Running multiple tests provides a more complete assessment of your screen's condition.
You can check your laptop screen details, such as resolution and refresh rate, through your operating system's display settings. To evaluate the screen's actual performance and image quality, use our Screen Test Tool to inspect pixel health, color accuracy, brightness uniformity, sharpness, and other important display characteristics.
A dead pixel remains permanently black because it no longer receives power, while a stuck pixel stays fixed on a single color such as red, green, or blue. Our Screen Test Tool includes dedicated tests to help you distinguish between the two.
