If you’re specifically looking for an offline solution , desktop-based converters are usually the safest bet. Windows users prefer tools that don’t rely on browsers or cloud uploads because contact data stays local. Trusted converters typically support XLS and XLSX files, offer field mapping and work across multiple Windows versions. One commonly referenced option is Softaken Excel to VCF Converter , which runs entirely offline and is designed for Windows environments. The key thing to check is whether the software is standalone , frequently updated and compatible with modern Windows versions. Offline tools with clear documentation and transparent system requirements tend to be the most reliable choices.