We have found 4 software records in our database eligible for .csv to .vcf file format conversion.
Many personal contact managers support import / export of contacts from both CSV and VCF files, so it should pretty easy to find program capable of csv to vcf conversion.
You can even find dedicated utilities that were designed exactly for the purpose of contact exports, for example the CSV to vCard converter.
CSV
Files with csv extension are text data files in common Comma Separated Value file format. Simple text file with values divided by comma, often used as an import/export format.
VCF
Files with vcf extension are almost always contacts saved in vCard format. Typically used various Personal Information Managers or e-mail clients (for example Outlook), as well as exported from mobile phones, for the purposes of sharing or migrating contacts from one device to another.