ExifTool is a free and open source software program which is used to read, write and update metadata of various types of files such as PDF, Audio, Video and images. It is platform independent, available as a perl library as well as a command line application. Metadata can be described as information about the data such as file size, date created, file type, etc. ExifTool is very easy to use and gives a lot of information about the data. In this blog we will discuss different ways in which ExifTool can be used.