We have found 3 software records in our database eligible for .vcf to .wab file format conversion.
vcf to wab conversion is not a file conversion per se, more of transferring of contacts between VCF files (vCard format) and Microsoft Windows Address book from Outlook.
You can certainly do this with the use of some creative import / export in older apps, but since Windows/Outlook nowadays uses account to sync your contacts, what you need to do is to import your .VCF to any solution that is synced with your account and then export it again, if you are really looking for this.
Updated: November 6, 2023
VCF
Files with vcf extension are almost always contacts saved in vCard format. Typically used various Personal Information Managers or e-mail clients (for example Outlook), as well as exported from mobile phones, for the purposes of sharing or migrating contacts from one device to another.
WAB
Files with wab file extension may be found as contact archives in Microsoft Windows Address Book format that was used in Outlook Express, a now discontinued email client.