What is the best way to avoid duplicate contacts when joining multiple VCF files?

[tylerhoward]

Duplicate contacts usually appear when VCF files are collected from different devices, email accounts and other backups. To prevent this, you have to preview the VCF files before final merging and ensure that the contacts are same names and phone numbers are not repeated. Manually merging often increases the risk of duplicates or missing fields. So, using a method that scans and previews contacts before merging is more reliable. Many users prefer solutions that keep all contact fields unchanged during the process. For example, tools like WholeClear Merge vCard Software allow users to check contacts before combining them, which helps reduce duplication and keeps the final contact list clean.