In this method, we will be installing the XML Tools plugin through Plugin Manager. By default, there is no option available to format/indent the XML code but you can modify it by using this plugin.

The most straightforward way to set Notepad++ as the default editor for .xml files in Windows 10 is to right-click the file > choose Open With > Select Choose another app and check the Always use ...

How to automatically install plugins on Notepad++? Open the Plugins Menu > Plugin Manager > Show Plugin Manager : The list of available plugins will be displayed.