Convert OST to PST freeware recovers emails and other data items in the event of OST file corruption. The software enables the user to recover OST file of unspecified size and save the recovered OST data in PST, MSG, EML and DBX formats. It is compatible with MS Outlook 97, 98, 2002, 2000, 2003, 2007, 2010 and 2013 versions. Free Convert OST to PST tool runs smoothly on MS Windows 98, XP, 2000, Vista, 7, 8 and 8.1.