Check for .git directory existence is a free Chrome extension developed by Jordi Jolink. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory.

The main purpose of this extension is to check for the existence of a .git directory on a website. This is important because having a publicly accessible .git directory can pose a significant security risk. All source files can be downloaded, which can lead to unauthorized access and potential data breaches.

By using this plugin, users can easily detect if their own websites or any other websites have this security vulnerability. It provides a simple and effective way to identify and address this issue, thus helping to enhance website security.