I have time figuring out how to dump all my tumblr posts into XML format and can’t find any import/export tools on tumblr dashboard.
Then I found this website http://haochen.me/tumblr/ which help me to import all my tumblr posts into XML file format which can be imported to wordpress.
The process is easy and sounds. I didn’t find any problem but there’s limitation to any post that doesn’t have title like quote and link. New category will come ups and need plugins to merge into the right category or tags.