FFD might refer to:
Focus Film Distance: In diagnostic radiography, The Focus Film Distance is the distance between the X-ray source and the film.
Free Form Deformations: In Computer Graphics, Free Form Deformations are a special kind of geometric methods or tools that can be used for changing or defining the shape of a 3D model .
Front flank downdraft: in meteorology, the leading edge downdraft of a supercell thunderstorm
FFD is also the IATA airport code for RAF Fairford