[Wilya]

Tumblr has a JSON API [1] that is fairly usable, and provides access to the essential parts of blogs (and terms of use explicitly allow building data portability applications on it, which is a nice touch). It's not instant-export, and I get the impression nobody uses it so it might not be rock solid, but if you need to export data, it's possible.

This tumblr2wordpress tool is probably built on it. So is Jekyll's tumblr importer. Honestly, the lack of export tools for Tumblr probably comes less from a lack of demand than anything else.

[1] http://www.tumblr.com/docs/en/api/v2 [2] https://github.com/mojombo/jekyll/blob/master/lib/jekyll/mig...