MailsSoftware Free OST Viewer Tool is an independent solution, which easily opens all types of Outlook PST files like- corrupted or orphaned from MS Exchange server MAPI address. It is a single wizard application, which performs without any issue. It maintains the Metadata properties and key elements during the process. The Free OST file Viewer software easily adds and browse the OST file. It gives many advanced features like- Split PST, which helps to convert large size Offline OST file in multiple small PST files and naming convention, which helps to save the data securely in his local device. The software provides an upgrade version, by using the PRO edition the user can convert the OST file data in PST and many other formats like- MSG, MBOX, EML, RTF, HTML, and MHTML and the user also save and converts the selected OST file folders. It converts contacts in .vcf and calendars data in .ics format. The Free OST file Viewer software is compatible with Outlook 2019, 2016, 2013 and all earlier version and supports to Windows 10, 8.1, 8 and all previous editions of Operating System. The upgrade version is available in a very inexpensive cost $49, $149 and $299. The MailsSoftware Free OST Viewer Tool gives a 24x7 technical supports for the technical or nontechnical users.