I just imported a blog with 400+ posts from Tumblr to WordPress and needed a way to bulk tag and bulk manage the categories of the imported posts. Everything is lumped into ‘uncategorized’ so I needed a way to select specific posts at the same time and bulk categorize them All plugins publicly avialable on the WordPress repo don’t let you select specific posts to bulk manage. I found a plugin a while back that was great for this, unfortunately, its gone. This plugin: Batch Categories no longer exists from the original author or in the WordPress Repo. But today is your lucky day! I found it in an old folder. Download it here.
You can add or remove the selected posts from the category you select. Or change the tags associated with all the posts selected