View a Pure White Full-Screen Display
Your essential tool for a bright white screen – ideal for testing, cleaning, lighting, or simply ensuring optimal display performance.
Looking for a full white display? Tap below to enter full-screen mode without interruptions.
Specific Screen Defect Tests
Why Use a White Screen?
Dead Pixel Detection:
Quickly identify pixels that remain dark against a white background. Refer to our comprehensive pixel check guide for detailed instructions.
Ideal for Screen Cleaning:
Brighten your screen completely to remove dust and smudges with accuracy.
Use as a Photography Light:
Provides consistent, soft illumination for indoor photos or video recordings.
Simple Reading Light:
Provides a bright, neutral background for makeshift ambient lighting.
Full-Screen Focus Tool:
A bright, blank canvas designed to help you focus or relieve eye strain.
Cleaning Mode
It is incredibly difficult to see dust and oily smudges on a black screen. A bright white background highlights every speck of dirt, making it the ultimate helper for cleaning your monitor, laptop, or phone display.
Dead Pixel Search
Dead pixels (pixels that fail to light up) appear as distinct black dots. They are most visible against a pure white background. Use this to check your warranty status on new monitors.
Benefits of screentester.org’s White Screen Tool
- Instant Access: Works directly in your browser with no downloads or installations required.
- True Full-Screen Mode: Uses the entire display area (behavior may vary depending on the system).
- Works on All Devices: Built with a fully responsive layout that adapts to any screen size.
- User-Friendly Interface: Simple and intuitive design for seamless navigation.
How to Get a Full White Screen?
- Click the Button: Hit the "Launch Full White Screen" button above.
- Allow Fullscreen: Your browser will expand to cover the entire display (including the taskbar).
- Use the Tool: Clean your screen or inspect for black dots.
- Exit: Simply click anywhere, press ESC, or swipe back on mobile.
Advanced Diagnostics: Beyond Dead Pixels
A full white screen isn't just for finding black dots. Professionals use it to diagnose screen uniformity issues that affect color accuracy and immersion.
Backlight Uniformity
Look at the edges and corners of your screen. Is the white slightly darker (vignetting) or yellowish? This indicates poor backlight distribution, common in budget IPS/VA panels.
Color Temperature / Tint
Does the white look "warm" (yellow/reddish) or "cool" (blueish)? This helps you evaluate your monitor's factory calibration. Most standard displays aim for 6500K (Daylight White).
Creative & Daily Utilities
Your monitor is a powerful light source. Here are some "life hacks" using a full white screen:
- Tracing Lightbox Turn your tablet or laptop brightness to 100% with a white screen. Place a paper sketch on top, then a blank sheet over it. The light shines through, allowing you to trace drawings easily.
- Photography Softbox Need flattering lighting for a Zoom call? Open this page on a second monitor or iPad facing you. It acts as a large "softbox" that fills in shadows on your face.
- Reading Light / Torch In a pitch-black room, a phone screen set to white provides a soft, non-directional light that is less harsh than the rear LED flash.
Technical Insights: LCD vs. OLED
Understanding how your screen technology interacts with white light is important for battery health:
- LCD / IPS Panels The backlight is always ON, regardless of the image. Displaying a full white screen consumes roughly the same power as a black screen. It is safe to use for extended periods.
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OLED Panels (Phones/TVs)
OLED pixels emit their own light. To display pure white (
#FFFFFF), every pixel must run at high power. This drains battery significantly faster and generates heat. We recommend using this tool for short durations (under 10 mins) on OLED devices.
White Screen FAQs
Is the white screen free to use?
Yes. screentester.org is 100% free with no ads. You don't need to download any images or install apps.
Will this work on mobile (iPhone/Android)?
Absolutely. Our tool is responsive and hides the browser address bar to give you a true edge-to-edge white display on any device.
How do I test for stuck pixels (colored dots)?
Stuck pixels (red, green, or blue dots) are hard to see on white. You should use our Black Screen Test to find them.
How do I exit the white screen?
Simply click anywhere on the screen, press the ESC key on your keyboard, or swipe "Back" if you are on a mobile device.
What if I see a red or green dot instead of a black one?
That is a "Stuck Pixel," not a dead one. Stuck pixels are hard to see on white. You should switch to our Black Screen Test to identify them properly.
Is this really "pure" white?
Yes. Our tool instructs the browser to render the color Hex Code #FFFFFF. However, the perceived whiteness depends on your monitor's color gamut and brightness settings.