Tired of videos that only play in your left or right ear? Downmix stereo to mono, duplicate single channels, balance audio, and boost volume for individual browser tabs.
Put on your headphones and click the test buttons below to hear the problem and fix it in real-time!
Everything you need to fix corrupted audio, quiet tracks, or uneven panning.
Accurately computes equal 50/50 blend of Left and Right audio signals, sending identical sound to both headphone drivers.
When one channel is filled with static or completely silent, copy the good channel to both ears and mute the broken one entirely.
Can't hear a soft-spoken teacher or quiet YouTube interview? Boost gain up to 3x without breaking tab audio fidelity.
Invert left and right output channels instantly. Perfect if headphones are reversed or video audio was rendered inverted.
Detects YouTube dynamic page navigation (`yt-navigate-finish`) so your settings stay active across playlist videos and recommendations.
Press Alt + Shift + M anytime to toggle mono mode on or off without reaching for your mouse.
No Chrome Web Store account needed. Load the source code directly into your browser!
Choose your browser release package:
git clone https://github.com/garora06/yt-mono-audio-fixer.git
Navigate to your browser's extension management page:
chrome://extensions or edge://extensionsfirefox/manifest.json via about:debuggingEnable Developer mode (top-right toggle), click Load unpacked (top-left), and choose the extension folder. You're ready to go!
Absolutely not. Mono Audio Fixer is 100% open-source and local. It operates solely through the browser's native Web Audio API and contains zero telemetry, analytics, or external network requests.
No. Unlike system-wide OS accessibility toggles, this extension only modifies the audio of the specific tab you have open. Your Spotify, games, or other tabs remain in rich full stereo.
Yes! On Android, you can install browsers that support desktop extensions such as Kiwi Browser or Firefox for Android and load this extension directly for mobile YouTube.
System settings turn everything on your computer into mono—including Discord calls, games, and music. Mono Audio Fixer lets you fix individual broken videos without compromising the rest of your audio setup.