MTSip Tel Finder is a free Chrome add-on developed by MTSip. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool allows users to find phone numbers on webpages and make them clickable through tel:// links. These tel:// links can then be used with a dial application that listens for tel:// links.

The functionality of MTSip Tel Finder includes the ability to set customizable patterns for detecting phone numbers. These patterns can be replaced with tel:// links (a href=tel://) on websites. Users can also specify websites where no detection should take place by adding them to the excludes list. When a phone number is clicked, the add-on will trigger the default dialer of the operating system using the tel:// protocol.

With MTSip Tel Finder, users can easily find and make phone numbers clickable on webpages, enhancing their browsing experience and simplifying the process of dialing phone numbers found online.