Safest method for merging VCard files is WholeClear Merge vCard Software. It is a trustworthy solution that guarantees your contacts remain secure and unchanged during the merge process. You simply choose the VCF files, preview them, and click merge. With support for every vCard version - 2.1, 3.0, or 4.0 - you will never face a compatibility issue. My contacts remain in the same fields as their prior definition - name, company, number, and email. It is quick, easy, and useful for both personal and business use. If you’ve been combining contacts manually and facing errors, this VCF Merger Tool will make the process effortless and completely safe. It is offering a free demo edition for all users.