White Screen Online Tool
A pure white screen tool for dead pixel testing, backlight bleed checks, and monitor illumination. Includes RGB modes and fullscreen support. 100% free and client-side.
Free Online White Screen & Pixel Tester
Need a pure white screeninstantly? Whether you're testing a brand new monitor for dead pixels, trying to find backlight bleed, or simply need clean illumination for a video call, our white screen online tool provides a high-performance, fullscreen solution.
Unlike basic static images, our tool offers a suite of pixel testing colors(RGB + Black/White) and a distraction-free UX. After entering fullscreen, all controls and your cursor will automatically hide, allowing for a 100% uninterrupted view of your display's performance.
Perfect for monitor calibration, cleaning your screen, or providing a soft lightbox for creative work. It's 100% free, runs in any browser, and requires no software installation.
Key Features
- Pure RGB + Black/White Modes
- Native Fullscreen API Support
- Auto-Hiding Cursor & UI
- 100% Clean, No Distractions
Pro Tip
To find "stuck" pixels (pixels that stay one color), cycle through Red, Green, and Blue. To find "dead" pixels (pixels that stay black), use the pure White screen mode in fullscreen.
How to Test Your Screen in 3 Steps
Detailed monitor inspection made simple.
Choose Your Mode
Select White for brightness, Black for backlight bleed, or RGB colors to check individual sub-pixels.
Go Fullscreen
Click the primary action button. This uses your browser's native API to cover every inch of your display.
Wait for Auto-Hide
Stop moving your mouse. After 2 seconds, all buttons and your cursor will vanish for a perfect inspection.
Industry Standard Testing Palette
Five essential modes for comprehensive display analysis.
When do you need a White Screen?
Beyond just testing, it's a versatile tool for professionals.
Quality Assurance
Check new monitors or smartphones for manufacturing defects like stuck pixels or pressure marks before your warranty expires.
Soft Illumination
Use your monitor as a giant softbox for Zoom calls or selfies. The pure white light provides flattering, even facial lighting.
Cleaning Assistant
Set the screen to pure white to reveal dust, smudges, and fingerprints that are invisible when the screen is dark or colorful.
The Advantage of Our Tool
Engineered for high-precision display testing.
True Color Reproduction
We use raw CSS hex values to ensure your browser renders the most accurate color possible without any compression artifacts.
Instant Response
Built with React and standard Web APIs for zero-latency switching between colors and fullscreen states.
No Tracking, No Distractions
Our White Screen Online Utility is built with privacy in mind. We do not track your display tests or collect any personal data.
The fullscreen mode is designed to give you a clinical environment for testing. No ads pop up, and no analytics cookies run while you are in the inspection phase.
White Screen & Pixel Testing — FAQ
Common questions about monitor testing and illumination