Software, network and database developers may often deal with XML (Extensible Markup Language) format of files. But in Windows, the default program used to open and view an XML file is the IE browser, so that we can only see the hard-to-read and elusive source code of XML file with IE. Although the format of the XML language itself is very neat, IE or Notepad can not meet our needs for quickly viewing, filtering and editing the data, code in a XML file.