My CSV file imports fine everywhere except during CSV to VCF conversion why?

I’m confused because my CSV file imports perfectly into Google Sheets, Excel, and even some email clients. But whenever I try any CSV to VCF conversion tool, the converter either shows an error or produces an empty VCF file. I double-checked the formatting and everything looks fine: headers are clean, no blank rows, phone numbers are consistent, and special characters are minimal. I even exported the CSV from different software just to validate it. Still, the CSV to VCF Converter tools fail. Is there something specific about the CSV format that VCF files require? I’m trying to convert CSV to VCF for a client who uses an Android phone, so I need a proper solution. Any insights?

Such situations are more frequent than people assume. Those CSV files that open without issues in spreadsheets might still bring difficulties when converted from CSV to VCF, as VCF is very demanding in terms of the formatting of the fields. To show, it may be that a field separator that is invisible to the eye, a symbol that is not supported or an extra comma may disrupt converters that are not robust. The second reason is that VCF files follow the vCard standard (2.1, 3.0 or 4.0), and most simple CSV to VCF converter tools only support one version. If your CSV contains fields that are incompatible with that version, the converter may generate a VCF file that is either empty or corrupted. Consider the possibility of saving your CSV in UTF-8 encoding and getting rid of merged cells and custom formatting. The issue is normally fixed when one employs a verified CSV to vCard Converter with mapping capabilities since it is possible to manually match each column with a corresponding vCard field before saving the file.