I have a large Excel (.xlsx) file containing thousands of contacts with fields like name, phone number, email address, company, and address. I need to convert this Excel file into VCF (vCard) format so that I can import the contacts directly into my Android phone and email clients. I have tried a few free online converters, but they either take too long, miss some fields, or generate incorrect VCF files. Accuracy is very important for me because even a small error can result in missing or duplicate contacts. Is there any Excel to VCF tool that can convert instantly and provide 100% accurate results without data loss? I am open to using a paid tool if it is reliable and secure.