This paper deals with the development of a software system for web-based geometric design of freeform motions. The Virtual Reality Modeling Language (VRML) is used to describe static and animated 3D objects. The Common Gateway Interface (CGI) is used as an interface for client/server communication, parsing user input from the web browser and returning information based on user input. This work extends the web server’s functionality to include geometric design of freeform motions and automatic generation of VRML models by porting our existing C++ implementation of motion approximation and interpolation algorithms to the internet using platform- and language-independent CGI scripting. Examples are provided for geometric design of line-symmetric motions over the internet.