sudo apt install libxml2-utils

echo 'your xml stuff here' | xmllint --format -

You will get a beautiful well-organized XML output.

Sources:

• https://jahansyed.co.uk/2016/04/22/how-to-install-xmllint-in-ubuntu/
• https://stackoverflow.com/questions/16090869/how-to-pretty-print-xml-from-the-command-line