Get the benefit of this free tool eSoftTools Free OST to PST Converter software. This tool allows converting Outlook OST file into PST with emails, contacts, calendar, contacts, drafts, and etc. It also provides many types of file formats to convert Outlook OST files such as Office 365, Gmail, Yahoo, ICS, MSG, HTML, MBOX, Zimbra, EML, vCard, and EMLX. It properly works in all Windows OS and MS Outlook versions. For fast conversion, it gives a bulk conversion option. Visit the official website of eSoftTools.