White Screen - Free Fullscreen White Display Tool Online

What

White Screen.im is a free, browser-based fullscreen display utility that converts monitors, tablets, or smartphones into clean, solid-color light sources and test panels. Positioned as a lightweight diagnostic and utility tool, it serves remote workers, content creators, photographers, and IT technicians who need quick solutions for monitor inspection, display cleaning, and ambient video lighting. The tool operates directly in any standard web browser without downloads, registrations, or software installations.

Features

• Adjustable Brightness and Color Temperature: Controls display intensity from 10% to 100% and shifts between cool, neutral, and warm tones to match ambient environments or lighting needs.
• OLED Burn-in Protection: Automatically fluctuates screen brightness by ±3% every 30 seconds to minimize pixel degradation during extended high-brightness use on OLED panels.
• Diagnostics and Pixel Grid Overlay: Provides 12 preset colors, a custom HEX color picker, and a toggleable coordinate grid to detect and locate dead or stuck pixels.
• Keep Awake Mode: Leverages the browser Wake Lock API to prevent the host device from entering sleep or screen timeout during long tasks.
• Lossless Image Export: Generates downloadable PNG solid-color backgrounds in resolutions ranging from 480p up to 8K (7680x4320) for offline or video production use.

Helpful Tips

• Toggle OLED Protection for Sustained Sessions: Enable the built-in OLED Protection setting whenever using maximum brightness for tracing, room lighting, or lengthy video conferences to mitigate image retention risks.
• Combine Colors for Pixel Audits: Test panels sequentially across white, black, and primary RGB colors with the pixel grid overlay to distinguish between dark dead pixels and colored stuck pixels for warranty reporting.
• Use Quick Presets for Rapid Setup: Apply the "Clean Mode" preset (100% brightness, neutral) to clearly reveal surface dust and smudges, or switch to the "Zoom Light" preset (90% brightness, warm) for balanced facial fill lighting on calls.

OpenClaw Skills

The source documentation contains no documented native integrations or APIs for the OpenClaw ecosystem. As a hypothetical use case, an OpenClaw workstation maintenance skill or automated onboarding agent could programmatically launch specific test URLs (such as targeted color screens or pixel grid configurations) to guide users through physical hardware validation or web camera lighting adjustments during remote workstation provisioning. If implemented, such an agent-assisted workflow would standardize basic display QA and desk setup procedures without requiring local binary installations.