SysTools OST Viewer Freeware is a user friendly and easy to use application to open and read Outlook OST files without Outlook Installation. It can also preview OST files items without setting up the Microsoft Exchange Server. The tool offers multiple view modes to read an OST file such as Normal, Hex, Properties, Message, MIME, HTML, RTF and Attachment. The OST file opener has Dual file scanning mode as Quick Scan and Advance Scan for opening the OST file. Quick Mode scans the healthy OST file while the Advance Scan used for scanning and repairing the damaged OST file and recover deleted mailbox items. Free OST file reader provides the interface of the tool similar to Outlook which makes it simple and easy to use with it great search features. SysTools OST Viewer is capable to open and read OST files with attachments of any types such as image, documents, files, etc. The interface of the freeware OST reader tool is also able to preview OST Contacts & Distribution list and show the contacts similar to that of Microsoft Outlook