Remove duplicate pdf pages in Preview? Preview has a pretty clean and efficient PDF editor, especially when it comes to adding and removing pages. 

What I'm really looking for is a function that can remove duplicate pages.

I've got a pdf with tons of duplicate pages and it would be really great if there was an option to remove all doubles.

Any ideas?
Click 'View' in the toolbar > Thumbnails. Then highlight the duplicated page, press delete to remove it.