Add Adsense Code in Blogger Template

I was recently developing a blogger template for Templates Crowd and I faced a strange problem. When I tried to add adsense code directly into the blogger template, it would not show up at all, Or an XML not well formed error messages, like the following, were displayed.

So, finally the solution of this issue is to replace certain characters like <, > etc, to their respective HTML entities. Now, it took me a lot of time to convert the adsense code to this working format. So I bring this tool for those who will going to add Adsense Code in Blogger Template.