Autodesk Revit Architecture supports both import and export of DWG format, so you can save and export your .rvt project as latest DWG CAD drawings.
You may also find programs, such as RTV Exporter (part of RTV Tools), that offer users with the option to export their .rvt files to several formats, including DWG, DXF or PDF. Unfortunately, we do not know about any rvt to dwg converter online. at this time.