I don’t want to upload my personal contacts online. Is there an offline software to combine vCard contacts safely? Any recommendations for tools that are secure and easy to use?

If you want to combine VCF files without risking data privacy, the best way is to use an offline tool such as Softaken Merge vCard Software. Since it runs locally on your computer, your contact data never leaves your system, unlike online services. This VCF Merger Tool allows you to merge vCard files from different sources like iPhone, Outlook, or Android into one file. With its batch merge VCF contacts option, you can safely handle hundreds of files at once, keeping all details intact and private.