Black Screen Online — One-Tap Pure Black Display

✓ 免费一键黑屏，全屏护眼防休眠

Turn your screen pitch black instantly and prevent device sleep. No app needed — runs in any browser.

🖤 Instant Black Screen — Tap once to go pure black — no configuration needed.
🔒 Prevent Device Sleep — Uses Screen Wake Lock API to keep your screen on while black.
📱 Mobile & Desktop — Works great on phones, tablets, and computers with touch or click.
🖥️ Fullscreen Mode — Automatically enters fullscreen for a completely dark experience.

⚠️ 需要启用 JavaScript 本工具完全在浏览器中运行，需要 JavaScript 支持。请启用 JavaScript，或改用支持 JavaScript 的现代浏览器，以体验完整功能。