全画面 白い画面
Lighting & Brightness
Sleep / Focus Timer & Ambient Noise
Keyboard Shortcuts
1-Click Wallpaper Downloader
Download exact-fit lossless wallpaper of the current screen color:
Engineered for Every Display Task
From professional video meetings to monitor maintenance, photography, and restful sleep.
Zoom & Webcam Soft Light
Turn your second monitor or laptop screen into a soft, diffused ring light. Use our Kelvin temperature slider to match your room lighting from 2700K warm candle to 6500K crisp daylight.
Monitor Cleaning & Inspection
A high-contrast white screen immediately exposes specks of dust, fingerprints, water spots, and micro-scratches on glass, IPS, and OLED displays.
Dead Pixel & Subpixel Test
Cycle through pure Red, Green, Blue, Black, and White test patterns to identify dead (dark) or stuck (single color) subpixels across your monitor panel.
OLED Black & Backlight Bleed
Test IPS corner glow, clouding, and backlight uniformity. On OLED panels, `#000000` turns individual pixels completely off for zero power draw and infinite contrast.
Digital Lightbox for Tracing
Place translucent paper or film directly over your tablet or laptop screen. Lock brightness to 100% and enable Wake Lock to trace sketches, calligraphy, and architectural blueprints.
Deep Focus & Sleep Timer
Eliminate distracting glowing screens in dark bedrooms. Combine OLED pure black with offline white or brown noise synthesis and automated sleep countdown timers.
Download Exact-Fit Solid Color Wallpapers
Generate lossless solid color wallpapers in Full HD, 2K, 4K, 8K, Ultrawide (21:9), and Mobile (9:16). Instant client-side download in PNG, JPG, or WebP.
Pick Wallpaper Color
Select Resolution & Format
Everything You Need to Know
Common questions about screen utilities, color temperature, dead pixels, and monitor care.
白い画面をZoomやWebカメラの照明として使うには？
Webカメラのすぐ後ろに画面を配置し、本ページを開いて全画面表示にし、明るさを最大に設定します。色温度（ケルビン）スライダーで肌色を美しく調整できます。
白い画面でモニターの掃除をする方法は？
明るい純白の背景を表示することで、普段見落としがちなホコリや指紋、油汚れが鮮明に浮かび上がります。確認しながらマイクロファイバークロスで優しく拭き取ってください。
4Kや8Kの純白壁紙をダウンロードできますか？
はい！ページ下部の壁紙ダウンロードから1080p、2K、4K、8Kの純白壁紙（PNG/JPG/WebP）を無料でダウンロードできます。