Free OST PST Converter Tool - Version 3.5 SysTools Software presents significantly well-organized tool that convert OST to PST file in a few easy steps. This Free OST PST converter tool exists in 3 formats like OST PST converter, OST MSG converter and OST EML converter to convert OST PST file and other file format. OST to PST converter retains metadata like: to, from, sender, receiver, cc, bcc and all attachments. Our OST to PST converter tool support to convert OST file to PST, EML and MSG file format i.e. full support for Thunderbird, Outlook Express, and Windows live Mail, Entourage and all other Emails clients.Download free trial version of OST to PST converter free to get to know the product functionality, whereas free version to converts OST PST file items free. Try free demo versions to take idea how software convert OST PST files. Demo has limited conversion option so it can only convert little items from Outlook OST to PST. If you want full license of software for full conversion quality then you have to