How do I add paragraph tags to all of my posts after relying on wpauto?

I found a way to export my posts in text form so that I can move them to a blog with static pages. The only problem is that there are no paragraph tags, so every post is a huge block of text. I had been using line breaks and relying on wpauto to add paragraph tags automatically.

Is there any way to add those tags into my posts without doing it by hand?

a quick and dirty way to do this is by running this ONCE:

global $post;
$posts = new WP_Query();
$posts->query(array('posts_per_page' => -1, 'post_type' => 'post'));
while ($posts->have_posts()):
  $posts->the_post();
  $post->post_content = wpautop($post->post_content); // replaces new line chars with <p>'s
  wp_update_post($post); // updates the database
endwhile;

(didn’t test it)

But how are you exporting your posts in text form? Maybe you could apply the autop filter in your export routine