The most useful and easy way to get free unlimited OST to PST converter software. The eSoftTools OST to PST Converter tool can easily import your large amount of OST files into PST, HTML, MBOX, EML, EMLX, Yahoo, Gmail, Office365, Zimbra, vCard, etc. It manages all email properties to, bcc, time, subject, from, and data. Convert OST to PST without the installation of MS Outlook. It keeps your data secure and provides users a full file preview before the conversion like email, contact, calendar, etc. It is an error-free tool and it has simple and easy steps for conversion.