The CloudMigration PST Converter is the best way to convert PST files to MBOX files. It doesn't require Outlook installation to convert Outlook PST files. This tool can convert PST files in bulk without losing data integrity. Other than MBOX files, it can convert PST files to PDF, CSV, EML, MSG, DOC, etc. With this tool, you can import PST into Gmail, Yahoo Mail, AOL, Office 365, and other email providers. Also, its navigation is simple and easier for any user. Overall, it is the best and most secure tool to convert PST to MBOX.