The old web app uses CSS Bootstrap 2 and the new CSS Bootstrap 3 have a lot of things different, we need to aware: Get into the issue/concept: http://stackoverflow.com/questions/17974998/updating-bootstrap-to-version-3-what-do-i-have-to-do http://getbootstrap.com/migration/ My Working Tool There is already an existing tool written in Python (b2tob3) but for me, it’s working only for HTML (extension .html) files and…