This plugin migrates sections, categories, posts, images, medias and tags from Joomla to WordPress.
It has been tested with Joomla versions 1.5 through 4.0 and the latest version of WordPress on huge databases. It is compatible with multisite installations.
Major features include:
migrates Joomla sections as categories
migrates categories as sub-categories
migrates Joomla posts (published, unpublished and archived)
migrates Joomla web links
uploads all the posts media in WP uploads directories (as an option)
uploads external media (as an option)
modifies the post content to keep the media links
resizes images according to the sizes defined in WP
defines the featured image to be the first post image
keeps the alt image attribute
keeps the image caption
modifies the internal links
migrates meta keywords as tags
migrates page breaks
can import Joomla articles as posts or pages
No need to subscribe to an external web site.
Premium version
The Premium version includes these extra features:
migrates authors and other users with their passwords
migrates the navigation menus
SEO: migrates the meta description and the meta keywords
SEO: keeps the Joomla articles IDs or redirects Joomla URLs to the new WordPress URLs
compatible with Joomla 1.0 and Mambo 4.5 and 4.6 (process {mosimages} and {mospagebreak})
migrates Joomla 1.0 static articles as pages
migrates Joomla 2.5+ featured images
migrates Joomla 2.5+ post links
migrates Joomla 3.1+ tags
migrates Joomla 3.7+ custom fields
migrates Mambo data
migrates Elxis data (Joomla 1.0 fork)
ability to run the import automatically from the cron