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MonoSleep - Pre-Bedtime Grayscale

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Overview

Automated bedtime grayscale filter to reduce late-night screen stimulation and encourage healthy sleep habits.

MonoSleep is a minimalist, local-first bedtime monochrome filter extension designed to suppress dopamine stimulation from late-night screen time and help you build healthier sleep habits. Similar to mobile Bedtime / Sleep Mode, removing vibrant colors makes video thumbnails, social media feeds, and infinite scrolling naturally unappealing, making it easier to log off and rest. 🌙 Key Features: • Scheduled Bedtime Grayscale: Automatically transforms all web pages to 100% grayscale during your designated sleep hours (e.g. 23:00 to 07:00). • Midnight Rollover Support: Seamlessly handles overnight time ranges spanning across midnight. • Subtle Pre-Bedtime HUD: Injects a discreet, Shadow DOM-isolated countdown reminder 15 minutes before your scheduled bedtime. • Instant Whitelist: Keep productivity or reference tools in color with single-click domain exclusion. • 1-Hour Snooze: Temporarily restore full color when you need to finish an urgent late-night task. 🔒 100% Local & Privacy-First: • Zero external network calls or tracking scripts. • 100% Vanilla JavaScript & CSS. Ultra-lightweight package • Zero telemetry. All configuration stays strictly inside your local browser storage.

Details

  • Version
    1.2.0
  • Updated
    October 1, 2026
  • Offered by
    sarai apps
  • Size
    35.5KiB
  • Languages
    English (United States)
  • Developer
    Email
    sarai.dev.apps@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

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