How do I convert a large CSV file into a single VCF without errors?

When converting a large CSV file into a single VCF, errors usually happen because the file is too big or fields aren’t mapped correctly. I faced this issue while moving thousands of contacts at once. What worked for me was first checking the CSV file for empty or broken columns, especially name and phone fields. Then I used a Windows-based CSV to vCard Exporter instead of an online tool. Software like Softaken CSV to VCF Converter easily handles large files smoothly, plus it supports a bulk conversion feature that helps to migrate any CSV contact list into a single VCF, and lets you preview and map fields properly. This way, the conversion completes without missing or corrupted contacts.