ost to pst converter online free to Convert inaccessible OST to PST format in few steps.  By using Outlook OST to PST Converter software has filter option to manage date, size, tittle, details and etc. after conversion OST files from ost to pst file.IT is the great way to recover orphaned OST file and restore Outlook OST to PST, , Office 365 account, pst file, EML, EMLX, MSG, HTML, MHTML, MBOX, VCF, CSV, ICS, Live, Exchange Server, Zimbra, Gmail, Yahoo, and etc.