I'm a lover of little tools that aren't used all that often...but...then come in handy just when you was gonna give up on trying to convert/adapt/re-hash/other...i've played with this :-
N.B. Staff/Team...please feel free to move to another area/section as i wasn't sure what category it should go under and here seemed appropriate-ish.
3D File Converter Software. Download Free. Convert for 3D Printing Models
Convert between all popular 3D file formats including STL, 3DS, 3DP, 3MF, OBJ and PLY. Easy to Use 3D Converter. Intuitive, fast and simple. Download free for Windows/Mac.
www.nchsoftware.com
N.B. Staff/Team...please feel free to move to another area/section as i wasn't sure what category it should go under and here seemed appropriate-ish.