Stella offline ost to pst converter software is the best free offline ost to pst converter software to convert all corrupted and unmounted ost mailbox items in to pst file this software is convert all ost file data in to pst file, eml file, emlx file, msg file, mbox file, tgz file, imap account and gmail account this software is convert all vrsion 32bit and 64bit ost file this software is convert all ost mailbox items using some simple steps. For more info visit this link https://www.stelladatarecovery.com/blog/how-do-i-convert-ost-files-to-pst-format/