Turn Off the Lights
Darken websites or dim video backgrounds with Turn Off the Lights, an open-source browser extension.
About Turn Off the Lights
Turn Off the Lights darkens web pages and dims the area around online video players. It uses stylesheet injection to apply dark mode to page backgrounds while keeping video colors unchanged, and shows a lamp icon when a video is detected to fade the rest of the page.
It is described as working on sites including Gmail, Google Docs, Reddit and Wikipedia, and detecting HTML5 players across many platforms. Users can adjust overlay opacity and color, use automatic dimming, and control the tool with a keyboard shortcut. Clicking outside the video restores the page.
Key features
- Universal dark mode using stylesheet injection that preserves video colors
- One-click lamp icon dims page background around video player
- Customizable overlay opacity, default 80%, with color choice
- Automatically detects HTML5 video players across 100+ platforms
- Night Mode converts white CSS backgrounds to black
- Analyzes video frames 60 times per second for surrounding lighting
Best for: People who read web pages or watch web videos and want a darker background with the video left undimmed.
Good for
- Keeps video colors unchanged while darkening surrounding page content
- Lists compatibility with many sites including Gmail, Google Docs, Reddit and Wikipedia
- States no personal data collection and no injection of advertisements
Turn Off the Lights at a glance
- Website
- turnoffthelights.com
- Category
- Software & Utilities › Browser Extensions
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension, iOS, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Browser Extensions
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Turn Off the Lights FAQ
How does the page dimming work?
Click the lamp icon when a video is detected to fade the surrounding page at the set opacity. Clicking outside the video restores the page. Opacity and color can be adjusted, and dimming can be set to start automatically.
What does Night Mode do?
Night Mode converts white CSS backgrounds to black. It is activated with a switch in the bottom-left of the screen.
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