SCREEN 📌 Quick Summary: Our free screen tests work on any device with a modern web browser. Choose your device below to run a complete diagnostic — dead pixels, burn-in, ghosting, uniformity, and refresh rate.
Screen Tests for Every Device
Whether you are testing a smartphone, laptop, tablet, or TV, our free online tools work everywhere. No downloads, no signups, no data collection. Just open the tool, follow the colors, and get a complete diagnostic in under 60 seconds.
Choose Your Device
- iPhone — Test your iPhone screen for dead pixels and burn-in
- Android — Test any Android phone screen
- Samsung — Test Galaxy S, A, Z Fold, and Z Flip screens
- Laptop — Test Windows, MacBook, and Chromebook screens
- MacBook — Test your MacBook Pro or Air display
- TV — Test your smart TV screen
- Tablet — Test iPad and Android tablet screens
What Our Device Tests Check
- Dead pixels — Permanently black dots that never light up
- Stuck pixels — Pixels stuck on one color
- Burn-in — Permanent ghost images (OLED)
- Uniformity — Uneven brightness or color
- Ghosting — Motion blur and trailing
What is a Screen Test?
A screen test is a diagnostic process that reveals hidden defects in your display. It works by displaying a series of solid colors and moving patterns on your screen. By observing how your screen reacts to these patterns, you can identify issues that are invisible during normal use, such as dead pixels, stuck pixels, backlight bleed, and burn-in.
Most people only notice a defect when it is too late — after the return window has closed. A screen test allows you to catch these issues early, whether you just unboxed a new device or you are buying a used one online.
Why You Should Test Your Screen
Testing your screen is not just a technical exercise. It has real-world consequences for your wallet and your peace of mind.
- Warranty Claims: If you find a defect, a documented diagnostic test is strong evidence for a warranty claim. Most manufacturers require proof of a defect before they will replace a screen.
- Buying Decisions: If you are buying a used device, a screen test is your best defense against scams. It takes 10 minutes and can save you hundreds of dollars.
- Peace of Mind: Even if you do not find a defect, testing your screen gives you peace of mind. You know that your device is in good health.
How to Test Your Device Screen
Testing your screen is simple. It does not require special software or equipment. Here is the exact process I use:
- Choose Your Device: Select your device from the list above. This will take you to a dedicated page with device-specific instructions.
- Open the Diagnostic Tool: Click the button to open our free diagnostic tool. It runs entirely in your browser.
- Enter Fullscreen: For the most accurate results, enter fullscreen mode. This eliminates distractions and ensures the colors cover your entire screen.
- Follow the Colors: The tool will cycle through white, black, red, green, and blue. Inspect each color carefully for anomalies.
- Interpret the Results: A black dot on every color is a dead pixel. A bright dot on one color is a stuck pixel. Uneven patches are uniformity issues. A ghost image is burn-in.
Common Screen Defects by Device
Different devices are prone to different types of defects. Here is what to look for on each device:
- iPhone: OLED burn-in, stuck pixels, and uniformity issues. The notch or Dynamic Island is a common area for defects.
- Android: Stuck pixels, burn-in (especially on AMOLED screens), and color shifting.
- Samsung: Burn-in on AMOLED screens, uniformity issues, and occasional dead pixels.
- Laptop: Dead pixels, backlight bleed (especially on IPS panels), and uniformity issues.
- MacBook: Dead pixels, backlight bleed, and anti-reflective coating damage (staingate).
- TV: Burn-in (OLED), dead pixels, and uniformity issues (especially on LCD TVs).
- Tablet: Dead pixels, uniformity issues, and backlight bleed.
Frequently Asked Questions
What is the difference between a dead pixel and a stuck pixel?
A dead pixel is a pixel that has completely stopped working. It appears as a black dot on every background. A stuck pixel is a pixel that is stuck on one color (red, green, blue, or white). Dead pixels cannot be fixed. Stuck pixels can often be fixed with software or gentle pressure. For a complete guide, read our article on Dead Pixel vs Stuck Pixel.
Can I fix a dead pixel?
No. Dead pixels are permanent hardware failures. No software, no pressure, and no "rice trick" will bring them back. The only real solution is a screen replacement. If your device is under warranty, file a claim. For a complete guide to dead pixel warranty policies, read our article on What is a Dead Pixel? The Complete Guide.
How do I test my iPhone screen?
Testing your iPhone screen is simple. Open our iPhone Screen Test page and run the diagnostic. Make sure to turn off True Tone and Night Shift in your settings before you start. For a complete guide, read our article on iPhone Screen Test: The Founder's Guide.
What is OLED burn-in?
OLED burn-in is a permanent ghost image left by static content like logos, taskbars, or game HUDs. It happens when some pixels age faster than others. True burn-in cannot be fixed, but it can be prevented. For a complete guide, read our article on What is Screen Burn-In? How to Detect, Prevent, and Fix It.
Can I test my TV screen?
Yes. Our diagnostic tool works on any device with a modern web browser. Open the tool on your smart TV browser, or use a USB stick to display full-screen color images. For a complete guide, read our article on Screen Tests for Every Device.
How do I test a used monitor before buying it?
Testing a used monitor is the best way to avoid scams. Run our diagnostic tool on your phone or a USB stick. Check for dead pixels, backlight bleed, and ghosting. For a complete guide, read our article on How to Test a Used Monitor Before Buying.
Is my data safe when I use the tool?
Yes. Our tool runs entirely in your browser. No data is uploaded to a server. No personal information is collected. You can test your screen with complete privacy.
How often should I test my screen?
For a new device, test it immediately after unboxing, within the return window. For a used device, test it before you buy it. For an OLED display, run a burn-in scan every month.