Several CAD related converters support both the AC3D (*.ac) file as well as VRML format and thus should help you with this conversion. Sometimes not all data can be converted because of the difference between formats.
Convert AC3D geometry data to Virtual Reality Modeling Language 3D model.
We have found 2 software records in our database eligible for .ac to .vrml file format conversion.
Microsoft Windows software - convert ac to vrml on Windows
3D Object Converter is a powerful 3D polygon model translation and interactive viewing shareware tool that allows arbitrary 3D model data to be imported from external sources, exported to various industry standard 3D file formats with great accuracy and quality.
Convert from ac file
to vrml file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ac to vrml. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert ac to vrml on OS X
Afanche 3D Viewer provide 3D visualization for many popular 3D formats including STL, 3DS, IGES (.igs/.iges), STEP (.stp/.step), X-T/X-B(Parasolid), VRML, DAE (Collada), DXF (Autodesk), SKP (SketchUp), Blend (Blender), SHP (ESRI), OBJ, TER, SMD, Q3D, Q3S, MDL, MD2, MD3, MD5Mesh, CSM, ASE, B3D, OFF, AC, MS3D, PLY, NFF, RAW, ASC, CSV, PCD, NAS, MESH, UNV, APT, G-Code (CNC), etc.