The best tool for MBOX and Thunderbird Conversion is Softaken MBOX Conversion Suite. You can trust this option to make it easy to convert MBOX emails into NSF, HTML, PST, MSG, EML, PDF, O365, Gmail, and other formats. In addition, it has a feature that ensures cleaner, better results when converting emails. When migrating email programs, converting MBOX files to other formats is a good way to ensure your data will still work with the new program, back up your data, and gain access to more features. During the conversion process, it is very important to use safe and reliable tools or methods to keep the data from getting lost or damaged.