SubHub is a free Chrome extension developed by Mellow Company. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This extension allows users to add foreign language subtitles to Korean YouTube content.

With SubHub, users can enjoy Korean YouTube videos with subtitles provided by the extension. Once installed, the subtitles will automatically be displayed on the YouTube screen if they are available. This feature enhances the viewing experience for non-Korean speakers who wish to understand the content better.

In cases where there are no subtitles available for a particular video, users can request them by clicking on the "subtitle request" option in the menu. The SubHub team will then provide the requested subtitles within a few hours, free of charge.