BLR MBOX Converter is a single solution that migrates many MBOX files to Outlook PST format. Some users can download this tool in any Windows OS edition. An efficient program for converting MBOX files to various formats, including PST, Office365, EML, MSG, Yahoo, Gmail, NSF, and HTML, is free. Among the email clients supported by the program are Mozilla Thunderbird, Opera Mail, Eudora Mail, Apple Mail, PocoMail, SeaMonkey, Entourage, Spicebird, Sylpheed, Mulberry, PostBox, Cone, and all variants of MBOX, MBX, MSF, MBS, and SBD. Users can load up to many MBOX files at one time without any data size limitations. Users can also use this tool's free trial edition to learn more features and functions.