Audio only on YouTube™ is a Chrome add-on developed by Downloadhub. This free program allows you to easily load YouTube videos with audio-only content. With the click of a button, you can switch YouTube to audio-only mode, conserving internet bandwidth and allowing you to listen to videos without loading the video content.

The add-on provides on/off switches through toolbar buttons. When the button's color is red, the add-on is active, and when it is lite grey, it is inactive. The default state is on, automatically loading only the audio source and preventing the video content from loading. This feature is especially useful considering that video content is typically much larger in size than audio content.

Audio only on YouTube™ works with HTML5 video elements and does not support flash. It includes a background image as a placeholder for the video elements. The add-on is available across all operating systems for the Chrome browser. It is a lightweight and user-friendly extension, making it easy to switch to audio-only mode on YouTube with just a single click.