XML and HTML markup languages are related to each other where HTML is used for the data presentation whereas the main purpose of XML was to store and transfer the data. HTML is a simple, predefined language while XML is the standard markup language to define other languages. XML document parsing is easy and fast.HTML is an abbreviation for HyperText Markup Language. HTML was designed to display data with focus on how data looks. XML was designed to be a software and hardware independent tool used to transport and store data, with focus on what data is. XML provides a framework for defining markup languages.The fundamental difference between HTML and XML is HTML is the standard markup for the web whereas XML is used for data binding / handling. Similarities: Both are used in web technologies. Both have similar syntax HTML attempts to control the appearance and presentation of data, while XML does not. XML defines data separately from its presentation. This makes XML data easier to locate and manipulate. XML is a standard data format that permits applications to exchange information across platforms and operating systems.