Big contact lists frequently become corrupted when they are converted due to the fact that their formatting is not consistent or that there are errors in Excel. It is recommended that the users first of all cleanse the sheet by taking out the empty rows and correcting the special characters. If users go on to Export Excel contacts to VCF manually, the likelihood of file corruption will be higher because of the limitations of the device. Using software that is capable of bulk processing is definitely a better way. A tool like OSTtoPST App Excel to vCard Converter can easily support batch lists without removing the framework. They allow users to convert Excel to vCard without any glitch and also Excel to vCard Conversion remains neat and uniform even if the contacts are in thousands.