A clean, lightweight Chromium extension that amplifies any browser media using the Web Audio API. Smooth, stable, and perfectly synced with video.
Everything you need for precise, smooth audio control in your browser.
Amplify any browser media from 0% to 600% using the Web Audio API gain node.
Linear gain ramping ensures zero audio pops or clicks during live adjustments.
One-click presets at 100%, 150%, 200%, 300%, 400%, 500%, and 600% for fast switching.
Your boost level and enabled state are saved and restored automatically across sessions.
MutationObserver auto-detects new media elements on SPAs and dynamic pages like YouTube.
WeakMap-based tracking ensures each media element gets exactly one audio graph — ever.
All CSS classes and JS identifiers use the
.iiuo-ab- prefix — zero interference with any
website.
Only requests activeTab, scripting, and
storage. No data collection, no tracking.
Built with performance and simplicity as the primary goals.
Open the popup, move the slider. That's it. No configuration, no setup, no learning curve.
Audio stays perfectly in sync with video. No lag, no desync, no playback interruptions.
A minimal, professional popup that stays out of your way and does exactly what you need.
Download, extract, load unpacked. The extension is ready in under a minute.
Low CPU and memory footprint. No background polling, no unnecessary loops, no bloat.
Built and maintained by the ITISUNIQUEOFFICIAL.com open-source community. Transparent and free.
Download the ZIP package and load it manually in your Chromium-based browser using Developer Mode.
Load the extension manually in any Chromium-based browser in under a minute.
Click the download button above or go to ab.itisuniqueofficial.com/v/1.0.0.zip to download the extension package.
Unzip the downloaded file to a permanent folder on your computer. Do not delete this folder after loading.
Open your browser and navigate to
chrome://extensions in
the address bar.
Toggle on Developer Mode using the switch in the top-right corner of the extensions page.
Click the Load unpacked button that appears after enabling Developer Mode.
Browse to and select the extracted
iiuo-audio-booster
folder. The extension will load immediately.
Pin the extension to your toolbar for quick access. Click the icon on any page with audio or video to start boosting.
Simple controls, instant results.
Navigate to any website that plays audio or video — YouTube, Spotify Web, podcasts, or any HTML5 media.
Click the IIUO: Audio Booster icon in your browser toolbar to open the popup control panel.
Drag the slider from 0% to 600% to set your desired boost level. Changes apply instantly in real time.
Click any preset button (100%, 150%, 200%, 300%, 400%, 500%, 600%) to jump to a specific level instantly.
Use the toggle switch in the header to enable or disable the booster without losing your current boost setting.
Click Reset to 100% to return to the default native browser volume level at any time.
For the best experience, increase the boost level gradually. Very high levels (above 300%) may cause distortion depending on the source audio quality.
Technical reference and usage notes.
IIUO: Audio Booster is a Chromium Manifest V3 extension that uses
the Web Audio API to amplify the volume of any HTML5 media element
on a page. It creates a
GainNode per media element
and routes audio through it before reaching the browser's audio
output.
Works on all Chromium-based browsers that support Manifest V3 and the Web Audio API:
Each media element is wired into a dedicated audio graph:
Gain is calculated as
boostPercent / 100. A 50ms
linear ramp prevents audio artifacts on every change.
activeTab — access the
current tab
scripting — inject
content scripts
storage — persist boost
settings
tabs — open extension
website link
chrome:// or
edge:// internal pages
Common questions answered.
Any Chromium-based browser that supports Manifest V3 — Chrome 88+, Edge 88+, Brave, Opera, and Vivaldi. Firefox is not supported as it uses a different extension API.
Download the ZIP, extract it, go to
chrome://extensions,
enable Developer Mode, click Load Unpacked, and select the
extracted folder. Full steps are in the Installation Guide
above.
It works on any website that uses standard HTML5
<audio> or
<video> elements.
It does not work on browser internal pages (chrome://) or some DRM-protected streams.
Yes. That is the core purpose of this extension. The Web Audio API GainNode allows amplification beyond the browser's native 100% volume limit, up to 600% (gain 6.0).
Yes. It has a minimal footprint — no background polling, no unnecessary DOM queries, and no third-party libraries. The audio graph is created once per media element and reused.
Very high gain levels can cause audio clipping and distortion, especially on low-quality source audio. Starting at 100% and increasing gradually helps you find the right level without damaging your speakers or hearing.
No. The extension does not collect, store, or transmit any personal data. Your boost settings are saved locally in your browser's storage only.