vcf
What is a .vcf file?
text/vcard
VCF (vCard) is a plain-text format for electronic business cards, storing contact details like names, phone numbers, emails, and addresses as property lines within BEGIN and END VCARD blocks. Multiple vCards can be concatenated in one file. It is the standard for contact exchange across devices.
How to use a .vcf file
Use an example VCF to test contact import, multi-card parsing, property and encoding handling, and interoperability between address-book applications.