SoundFixer
Adjust web audio issues with SoundFixer, including one-channel sound and low volume in videos.
About SoundFixer
SoundFixer is a WebExtension that adjusts sound problems on web pages, such as YouTube videos. It addresses audio that plays in one channel only, audio that is too quiet even at maximum volume, and audio that is too loud even at minimum volume.
It is provided for Firefox through addons.mozilla.org. It does not work on all websites because the Web Audio API cannot be used with a cross-domain audio source.
Key features
- Fix audio that plays in one channel only
- Raise volume for audio that is too quiet at maximum
- Lower volume for audio that is too loud at minimum
- Process web video audio such as YouTube videos
- Install as a Firefox extension from addons.mozilla.org
Best for: People who watch web videos such as YouTube and encounter one-channel sound or volume extremes.
Good for
- Handles one-channel audio, very quiet audio, and very loud audio
- Works with YouTube videos, which are not cross-domain
- Source code is public and released into the public domain under the Unlicense
Watch out for
- Does not work on all websites with cross-domain audio sources
- Only the Firefox version is from this author; versions in other stores are not
SoundFixer at a glance
- Category
- Software & Utilities › Browser Extensions
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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SoundFixer FAQ
Why does SoundFixer not work on some websites?
It cannot use the Web Audio API with a cross-domain audio source, so those sites are not supported.
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