Ultra Dark Mode EN

Ultra Dark Mode turns every website into a comfortable, eye-friendly dark theme — instantly. No more squinting at glowing white pages at midnight, no more battery-drain on OLED screens, no more waiting for sites to add their own dark mode.

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WHAT IT DOES
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• Generates a high-quality dark theme for any website on the fly
• Works on the messy pages other dark-mode tools give up on
• Preserves images, videos, and intentional brand colors
• Lets you fine-tune brightness, contrast, sepia, and grayscale
• Saves per-site preferences so each site looks exactly the way you want
• Schedules dark mode by time of day or follows your system theme
• One keyboard shortcut to toggle on or off (Alt+Shift+D)

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DESIGNED FOR LATE NIGHTS
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We built Dark Mode for the writer wrapping up a draft at 1 AM, the developer reading docs in bed, the student researching at the kitchen table after the lights go out, and anyone whose eyes deserve a break from default bright-white screens.

Default settings ship with a slightly warmer balance (95 brightness, 105 contrast, 5 sepia) — just enough sepia to take the harsh edge off whites without making everything feel like an old paperback.

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THREE THEME ENGINES
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• Dynamic — analyzes each page and crafts a custom dark theme (best quality, recommended default)
• Filter — fast CSS filter inversion (best on slower machines)
• Static — applies a minimal stylesheet (most predictable)

Switch between them with one click in the popup. Each site can use a different engine.

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PRIVACY FIRST
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We don't collect anything. No analytics. No telemetry. No accounts. No "anonymous" tracking. No data leaves your browser, period.

The extension runs entirely on your device, using bundled configuration files for theme generation. There are no remote servers to phone home to, because we don't have any.

Your settings stay on your machine, optionally syncing through your browser's built-in sync (which we cannot see). Read the full policy at https://darkmodes.org/privacy.html.

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FEATURES
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• Brightness, contrast, sepia, grayscale sliders
• Custom font and stroke options
• Per-site theme overrides
• Allow-list and block-list for sites
• Time-based or system-theme automation
• Keyboard shortcuts (Alt+Shift+D toggle, Alt+Shift+A per-site)
• Multiple color schemes (Default, Pitch Black, Sepia, Ocean, more)
• Detection of sites that already provide dark mode (won't double-apply)
• PDF reader dark mode

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PERMISSIONS, EXPLAINED
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• Read and change all data on websites — required to inject the dark theme CSS into the pages you visit
• Storage — saves your preferences locally on your device
• Alarms — runs the time-based schedule, if you enable it
• Tabs — knows which tab you're on so per-site settings apply correctly
• Context menu (optional) — lets you toggle from the right-click menu
• Font settings (optional) — only used if you choose to override site fonts

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FREE FOREVER
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No paywall. No "Pro" tier. No nag screens. No "support our work" pop-ups. Just a tool that does one thing well, and stays out of your way.

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SUPPORT
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Questions, bug reports, or feature requests? Email harryngh@gmail.com.

Website: https://darkmodes.org
Privacy: https://darkmodes.org/privacy.html
Terms: https://darkmodes.org/terms.html