Check PassFixer OST to PST Converter software to convert Outlook OST file into PST. It’s a very big OST file conversion tool. This tool is able to recover your damaged Outlook OST file. It provides many types of file formats to convert Outlook OST files such as EML, HTML, Yahoo, Gmail, office 365, MSG, ICS, MBOX, Zimbra, EMLX, and vCard. You can also see the preview of your Outlook OST file with the live preview feature.