outlook ost to pst converter free download tool can conversion import outlook OST to PST file  and convert ost to pst in outlook 2016 without installing MS Outlook. With converting all Exchange mailbox attachments such as- emails, contacts, calendars, journals, sent items, deleted items, and more objects in new outlook pst file by using outlook ost file converter software.  This tool simply works to fix outlook ost file and restore outlook ost2pst file, Office 365 account, pst file, EML, EMLX, MSG, HTML, MHTML, MBOX, VCF, CSV, ICS, Live, Exchange Server, Zimbra, Gmail, Yahoo, and etc.