Import a contact on iCloud.com
Every contact appears on a virtual card called a vCard. You can import vCards.
Contacts can import vCard format version 3.0 or later.
In Contacts on iCloud.com, tap the Action pop-up menu in the sidebar, then choose Import vCard.
Select a vCard to import.
Contacts from imported vCards are added to the All Contacts group. To move contacts to another group, you need to sign in to iCloud.com on a Mac or Windows computer. See Create a group of contacts on iCloud.com.
If the vCard contains contact information for more than one person, each contact becomes a separate entry.
If you cannot import a vCard, this may be because it exceeds the iCloud Contacts size limit. See the Apple Support article Limits for iCloud Contacts, Calendars, Reminders, Bookmarks and Maps.