.ost to .pst File Converter Free Download – a great conversion application for users to easily export and save Offline OST files into PST file format including all emails, calendars, contacts, notes, tasks, briefcase, and attachments. By using the .ost to .pst file Converter free download version you can import up to 20 items from OST file to PST format without any cost. You can also convert bulk data from OST mailbox to PST format with help of the tool, but you need to buy its license key. Using OST to PST license edition, you can move batch OST files in Outlook PST file at once even without Outlook installation.