We'll create fresh WordPress site with Generate WordPress Entities installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Generate wordpress pages, posts, categories, comments for development enviroment in few clicks.
You can generate entire site content in one click, or configure each entity and generate it separately.
You will be able to generate: categories, posts, pages.
Video on YouTube showing how it works
Featured images generator added in 1.3, but be patient if you generate many posts it takes some time to generate featured images, wordpress also creates thumbnails foreach image. To exclude timeout error you may change execution limit for php scripts in your php.ini.
Post custom meta fields generator added in 1.4, now you can generate anything you want.
Notice: when you deleting content fron GWE page, all content will be deleted rather than fake. Please add real content just after you finish your work and deleted all fake content. Thanks @soragrey for feedback.