If you are looking for a trustworthy and safe way to
split vCard files and want to do it without an internet connection, then try using
WholeClear Split vCard Software. Because it works fully offline, which means my data is never online; it runs on your system and does not share it or upload anything to an internet resource. It also supports all versions of vCard files: 2.1, 3.0, and 4.0. You can split one huge VCF file into a separate contact file. The software is virus-free, runs fast, and is very user-friendly. It supports all versions of Windows and has a free demo. If you care about the privacy of your contacts and want to use a tough security tool, this may be your choice.