[Ifeffit] Primitive unit cell from .cif file

Hi everyone, I was wondering if there is a simple (free) utility for producing a primitive cell (not conventional) from an asymmetric cell and space group. Basically, I want to be able to easily go from a crystallographic information file to a primitive unit cell. I know that there are ways to do this within applications like material studio, but these are expensive. Any help would be appreciated. Thanks, Josh Kas