A simple RIB file converter
input file
output file
precision N=
digits
A simple JS based converter for spline based models (it will ask your permission for read/write operations on hard disk)). See Importing 3DS models for detail.
This script makes JS arrays for spline patches data with given precision. You can just copy result and put it in your WebGL script (use e.g. spline_model.html) or add one more JS file with data.