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Extension

Volume Booster

Boost any tab's audio up to 600% with low distortion.

Add to Chrome

Boost HTML5 video and audio volume up to 600% per tab using Web Audio gain, beyond your system maximum. Each tab remembers its own level; quick presets and mute are one click away.

TIP

Refresh the page once after install if media elements were already playing before the content script attached.

Getting started

  1. Install Volume Booster and start playback on a tab.
  2. Click the toolbar icon on that tab.
  3. Move the slider or tap a preset (50%, 100%, 200%, etc.).
  4. Volume applies immediately; a brief on-page badge confirms the percentage.

A large readout shows the current level (for example 250%). The slider runs from 0 (mute) to 600 (default 100).

Quick-select chips: 50%, 100%, 200%, 300%, 400%, 500%, 600%, and Mute.

Per-tab memory

Unlike global speed tools, Volume Booster stores tabVol_{tabId} in chrome.storage.local. Opening the popup on another tab loads that tab's saved level. Background tabs keep their boost until you change or mute them.

Web Audio engine

The content script creates an AudioContext and GainNode, then calls createMediaElementSource once per <video> or <audio> element (marked with dataset.boosted). Gain equals slider value ÷ 100, so 600% = 6.0× amplification.

WARNING

Extreme boost may distort or clip audio. Cross-origin media without CORS may fail to connect; check the console for warnings.

Features

  • Up to 600% boost: Slider with presets at 50%, 100%, 200%, and mute.
  • Per-tab memory: Each tab remembers its own boost level.
  • Web Audio gain: True amplification via gainNode, not just OS volume.
  • Video and audio tags: Applies to all HTML5 media elements.
  • Visual feedback: Temporary % badge on media.
  • Instant apply: Popup updates gain in real time.

Privacy

Tab volume keys are stored locally. No audio is transmitted externally.

See the Apps & Extensions Policy and Privacy Policy for company-wide details.

Need help?

Some streaming sites block Web Audio on cross-origin streams; reload and try again. Each media element can only be connected once per page load.

Contact us via the support page if you need more assistance.