The best way to quickly convert multiple ZIP files to RAR is to use a specialized conversion tool instead of extracting and re-compressing files one at a time. Extracting and recompressing each can consume lots of time in dealing with even larger file archives. I recommend Softaken Archive Converter Software because it is designed for bulk file conversion. You can choose multiple ZIP files and convert them to RAR format with just a few clicks without losing data. It is easy to use built-in batch processing and keeps your original file intact throughout the process. This saves hours of work and gives you accuracy every time.