Thank you XML and NotePad++

Use the XML Tools plugin for Notepad++ and then you can Auto-Indent the code with Ctrl + Alt + Shift + B .For the more point-and-click inclined, you could also go to Plugins --> XML Tools --> Pretty Print. Search "XML TOOLS" from the "Available" option then click in install.Jan 28, 2015

How to indent HTML tags in Notepad++ - Stack Overflow

stackoverflow.com/questions/.../how-to-indent-html-tags-in-notepad