Key features
- per-tab volume boost up to 600%
- fine-grained 0%–600% slider
- one-click switch to the tab currently playing audio
- no ads, no paid tier
What Volume Master does
Volume Master connects to a tab's audio output and lets you multiply the volume beyond your system's normal maximum, up to 600%. A slider gives fine control between 0% and 600%, and a button lets you jump directly to whichever open tab is currently playing sound, useful when you have many tabs open and can't tell which one is making noise.
Volume Master and full-screen video
Chrome shows a small blue indicator in the tab bar whenever an extension is manipulating a tab's audio, and it blocks true full-screen while that indicator is active. This is a Chrome safety feature, not a bug in the extension. Pressing F11 (Windows) or Ctrl+Cmd+F (Mac) can reduce the visible browser chrome around the video.
Is Volume Master safe?
The extension asks to read and change data on every site you visit, which it needs to connect to and modify a page's AudioContext and to detect which tabs are playing audio. It's free with no ads. As with any extension that touches every page, only install it if you're comfortable with that scope of access.