Volume Booster

Amplify browser tab audio safely up to 600%. No adware, no tracking, 100% local. Works on YouTube, Spotify, Netflix and any website.

Your system volume is capped. This removes that cap. Volume Booster amplifies any tab's audio in real time -> up to 600% louder. Great for quiet videos, weak laptop speakers, noisy environments, or video calls where the other person sounds like they're whispering from a different room. WORKS ON SPOTIFY, NETFLIX, AND STREAMING SITES Volume Booster captures audio at the system level, after any decryption happens. That means it works on sites with protected audio pipelines - Spotify, Netflix, Twitch - where many other boosters silently give up. FULLSCREEN WORKS TOO Boosting audio on Netflix or YouTube and want to go fullscreen? Just press the button - it works. Volume Booster is one of the few boosters that handles Chrome's capture-lock limitation so fullscreen behaves exactly as you'd expect. SIMPLE BY DESIGN Real-time slider - drag it, hear it change instantly. Per-tab memory - each tab keeps its own setting independently. Persists across tab switches - set it once and forget it. Reset to normal in one click. COMPLETELY PRIVATE Only the permissions actually needed: - activeTab - to know which tab to boost - tabCapture - to capture that tab's audio - storage - to remember your per-tab settings - windows - to keep fullscreen working while boost is active No browsing history. No analytics. No network requests. All audio processing happens on your device and stays there. HOW TO USE 1. Click the Volume Booster icon in your toolbar 2. Drag the slider to your desired level 3. Boost applies instantly - no page reload needed 4. Click "Reset to Normal" to return to 100% PERFECT FOR - Videos recorded at painfully low volume - Laptop speakers that just don't cut it - Noisy environments where you need everything louder - Video calls where the other side is too quiet - Accessibility needs requiring louder audio Built on Chrome's tabCapture API and the Web Audio API. Everything runs locally. Nothing leaves your machine. Compatible with Chrome 109 and above.