Polygon Checker is a free Chrome extension developed by dannyshmueli. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools subcategory. This extension aims to provide users with a convenient way to check if a given coordinate is within a polygon.

With Polygon Checker, users can input a list of coordinates on a map, where each coordinate consists of latitude and longitude values. Additionally, users can input a single map coordinate that they want to verify. The extension then processes these inputs and provides a simple output: True if the single coordinate is within the polygon, and False if it is outside the polygon.

This Chrome extension offers a valuable tool for individuals who work with geographic data or need to verify the location of specific points on a map. With its straightforward functionality, Polygon Checker simplifies the process of coordinate verification within polygons.