[Perrydu]

If you write blog posts in markdown, it's useless.

[jabbernotty]

It is for html. It is called Htmlify.

I don't see why you feel a need to call it useless, just because it doesn't apply to markdown.

[Nurdok]

I blog with tumblr (http://blog.amir.rachum.com) and HTML is the only viable option I see there. Yeah, I probably need to change my venue :) In any case, this project (as stated in the footer) is more of an experience for me. I don't expect this to revolutionize anything. Just a nice tool which I personally need.

[elliottcarlson]

You can switch to the Markdown editor on your settings page; https://www.tumblr.com/settings

[deepdog]

You can use HTML in Markdown.