Looking for a tool to convert OST to PST in Outlook 2016/2013/2010/2007, try eSoftTools OST to PST Converter software. This is one of the best tools to convert OST files to PST format. It can migrate all OST files into various formats like PST, MBOX, OFFICE 365, EML, EMLX, MSG, HTML, MSG, vCard with all email attachments like to, cc, bcc, subject, time, date, etc. this tool export single as well as multiple files instantly in PST format without Exchange server. It’s 100% tested from anti-virus and online scanners you can download a free demo pack to save 25 items from each PST file.