NebulaNorm — YouTube Volume Normalizer (Edge/Chromium Extension)

Keeps YouTube audio at a more consistent loudness using a compressor + makeup gain + brickwall limiter. Includes an optional slow auto-gain (AGC). The on/off toggle is inserted next to the YouTube CC button.

Features

• Works on normal videos, Shorts, and Live.
• One-click toggle in the YouTube control bar.
• Strength presets: Light / Medium / Strong.
• Output gain (-12…+12 dB) and optional AGC.
• Remembers your settings (sync storage).
• Lightweight, no external libraries.

Install (Microsoft Edge)

1. Download and unzip the provided file.
2. Go to edge://extensions → toggle Developer mode (top left).
3. Click Load unpacked → select the unzipped folder (the one with manifest.json).

Edge doesn't install from a .zip directly. Unzip first, then load the folder.

Usage

• Open any YouTube video. A new NN toggle button appears next to the CC button.
• Click to enable/disable normalization.
• Right-click the NN button to open the mini settings panel.

Notes

• This extension builds an in-page WebAudio graph: video → compressor → analyser → makeup gain → limiter → destination.
• The limiter prevents harsh clipping when content is too loud.
• The optional AGC gently nudges overall gain toward a target RMS to help when speakers in a clip have uneven levels.
• No trademarks used. Icons are original.

Privacy

• No networking, no tracking.