You need to be more descriptive.

Rattles when turning?  Clicking perhaps?  Probably outboard CV joints.
Rattles or knocks when starting or stopping?  Tighten the inner control
arm to body bolts.
Rattles when driving straight?  Cruising speeds?  Around town speeds?
Could be bearing caps on the struts, ball joints, or inner/outer tie
rod ends.

Not much will "look" loose upon visual inspection.  Raise the front end
and wobble the tires, side-to-side, in-n-out, up-n-down, see if/how
they are loose, listen for rattles.