Yes, the honest truth is that the preview feature is extremely helpful. There was a time when I had a CSV file that contained some hidden formatting issues, and the preview is what saved me by letting me see the problem early. The tool I used was OSTtoPST CSV to VCF Converter, and it shows your whole CSV in a nice table before any export. So verifying names, phone numbers, emails, and even empty rows becomes possible for you. When combined with the mapping feature, this makes CSV to VCF conversion safer. If you were the one to convert CSV to VCF on a regular basis or are working with varying CSV structures, then preview support would be almost very important. This tool also makes a good CSV to vCard converter, as it is able to keep the data well-organized and accurate.