Chrome Extension

Transform YouTube into a Sleep-Safe Audio Experience

Eliminate sudden volume spikes, harsh frequencies, and inconsistent loudness. SleepyTube makes any YouTube video gentle enough for sleep.

Add to Chrome - Free View on GitHub
0ms
Latency
100%
Private
Free
Forever
youtube.com/watch
Before: Chaotic Volume
SleepyTube Processing
After: Smooth & Safe
Features

Everything You Need for Sleep-Safe Audio

Professional-grade audio processing, simplified for everyone

Smart Compression

Automatically smooths volume differences between quiet and loud moments

Brickwall Limiter

Hard cap on maximum volume - nothing can exceed safe threshold

Auto Gain Control

Maintains consistent loudness (-18 LUFS) across all videos

Sleep EQ

Reduces harsh high frequencies and rumbling bass for gentler sound

Voice Focus Mode

Enhances speech clarity while ducking background music and noise

Personalized Settings

Save your preferences with configurable strength and softening presets

NEW 🤖

AI Video Predictor

Predict audio quality before watching with AI-powered analysis. Get badges showing potential issues like sudden sounds, fast speech, or volume changes.

Gemini AI OpenAI Free Tier
Technology

Professional Audio Processing in Your Browser

Built with Web Audio API for zero-latency real-time processing

1

Capture

Intercept YouTube audio stream without downloading

→
2

Process

Apply compression, EQ, and limiting in real-time

→
3

Output

Deliver smooth, sleep-safe audio to your speakers

# Audio Processing Pipeline

Video Audio
    ↓
MediaElementSource
    ↓
Multiband Split (Low/Mid/High)
    ↓
Voice Detection & Ducking
    ↓
EQ Filtering
    ↓
Dynamic Compressor
    ↓
Auto Gain Control
    ↓
Brickwall Limiter
    ↓
Audio Output 🔊

Key Technologies

  • Web Audio API

    Native browser audio processing - no external dependencies

  • DynamicsCompressor

    Reduces dynamic range using industry-standard algorithms

  • BiquadFilter

    Surgical frequency control with minimal phase distortion

  • Real-Time Analysis

    Loudness measurement and adaptive gain adjustment at 60 FPS

Get Started

Install in Minutes

Choose your preferred installation method

Chrome Web Store

(Coming Soon)

One-click installation from official Chrome Web Store

Download Release

✨ Recommended

Download the latest packaged release from GitHub

Download Latest Release

📦 Installation Steps:

  1. Download sleepytube-v*.zip from GitHub Releases
  2. Extract the ZIP file to a folder on your computer
  3. Open Chrome and navigate to chrome://extensions/
  4. Enable "Developer mode" toggle in the top-right corner
  5. Click "Load unpacked" and select the extracted extension folder
  6. Navigate to any YouTube video and click the Sleep Mode button 😴
Note: Automatic updates via GitHub Actions CI/CD are enabled. Check the releases page for the latest version.