Converting Excel to vCard does not cause data loss if the Excel to VCF conversion is done correctly. Data loss usually occurs when users manually convert Excel contacts to vCard without field mapping. Duplicate contacts may appear when Excel files are converted multiple times without cleaning the data. Using Softaken Excel to vCard Converter helps avoid data loss during Excel to VCF conversion by preserving all contact fields. The tool also reduces duplicate Excel contacts when exporting XLS or XLSX files to vCard (VCF) format.