Black Screen Online — One-Tap Pure Black Display

✓ 免費一鍵黑屏，全屏護眼防休眠

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.

⚠️ 需要啟用 JavaScript 本工具完全在瀏覽器中執行，需要 JavaScript 支援。請啟用 JavaScript，或改用支援 JavaScript 的現代瀏覽器，以體驗完整功能。