How to blog on website without changin html code

I have nearly setup a blog using html and css and I am about to set up the individual blog pages. But it seems a bit tedious to me that I will have to edit the html code for the blog pages everytime I make a new page. Is there a way around this? I want to be able to simply write my new blog post on any text editor and not have to fiddle around with the code and see it on the website.