無料のブラウザツール・インストール不要
赤い画面
専用の全画面ツールを開くには色を選んでください。
Screens
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Watch: 赤い画面 in action
See it fill the screen edge-to-edge, then open it full screen on your own display.
ブラウザで全画面の赤い画面をすぐに開けます。この無料ツールはワンタップで画面全体を純粋な#e11d2eで満たします — night light, alerts, testingに最適。ダウンロード不要、インストール不要、どんな端末でも動作します。
赤い画面の使い方
Check for stuck red subpixels
A pure red channel reveals permanently stuck or failing red subpixels that other colors can hide — one of the first screens to run in a diagnostic pass.
Warm fill light that flatters on camera
A warm red fill neutralizes cool, unflattering room illumination on webcam sessions and adds a cozy glow to evening streaming.
Protect night vision
Red light doesn't ruin your eyes' dark adaptation. A red full-screen is ideal for dark rooms, astronomy, and late-night work.
Safe light for photography
Red is a classic darkroom safe light — use a red full-screen when handling light-sensitive materials.
どんなときに使う？
画面を赤い画面で埋める
あらゆるモニター、ノートPC、スマホ、タブレットで純粋な#e11d2eを端まで表示。タイルをタップしてプレビューし、ワンクリックで全画面に。
シンプルで邪魔のない背景として使う
無地の赤い画面は、ビデオ通話の背景、落ち着くライト、集中できる作業画面として活躍します。
赤い画面を高画質PNGとしてダウンロード
赤い画面をHD、4K、正方形、ストーリー、または任意のサイズでロスレスの圧縮PNGとして書き出せます。
よくある質問
全画面の赤い画面を開くには？
Select the 赤い画面 tile on this page, then press Go Full Screen. Your browser fills the entire screen edge-to-edge with #e11d2e. Tap anywhere or press Escape to exit.
赤い画面をビデオ通話やZoomの背景に使えますか？
Yes. Open the 赤い画面 on a second device or window, position it behind you, or use it as a light source to evenly light your face on a call.
赤い画面を画像としてダウンロードできますか？
Yes. Pick the 赤い画面 color, choose a size preset or type a custom width and height, then press Download PNG. You'll get a lossless, high-quality image at exactly that size, rendered in your browser — nothing is uploaded.
赤い画面ツールは無料ですか？
Yes, this tool is 100% free and works entirely in your browser. No account, no sign-up, and no images are uploaded or stored.
他の色を試す
Related tools & pages
Related guides
Learn how to get the most out of this tool.
How to Check for Dead Pixels (and Stuck Pixels) on Any Monitor
A full-screen color test is the fastest way to find dead and stuck pixels. Here's how to run it properly, which colors to use, and what to do if you find one.
How to Fix a Stuck Pixel with a Color Flash (and When It Won't Work)
A stuck pixel is often fixable with a rapid red/green/blue flash. Learn the method that sometimes revives a stuck subpixel — and when to give up and claim warranty instead.
人気の全画面カラー
各リンクは即座に全画面で開きます。白と黒が最も検索されていますが、緑・青・ピンクは動画や配信のセットアップで人気です。
More Screen Tools
Zoom Light Screen
Adjustable-color full-screen light for video calls — dial in the perfect color temperature to look natural on camera.
Ring Light Screen
Create a custom-colored glow ring around your webcam window — softer than a solid fill and mimics a physical ring light.
Screen Flashlight
Instant max-brightness white fill — turns your screen into a portable flashlight for finding things in the dark.
Broken Screen Dummy
Convincing cracked-screen overlays — pick from spiderweb, shatter, glitch, or LCD bleed styles to prank a friend.
Fake Update Screen
Classic Windows, macOS, or Linux-style fake update screens — lock the display and watch coworkers think you're updating.
No Signal Screen
Animated TV static with a bouncing NO SIGNAL overlay — convincing enough to make someone check the cables.