for Windows 10/8/7/Vista/XP
Cigati Outlook OST reader is a complete freeware and not a paid software. So no need to pay anything. You can just download it and use it to view, read and open OST files.
Open OST Files
The OST viewer is one of the most advanced tools which not only helps you to view offline OST files which are healthy but also supports viewing of corrupt OST files even without Outlook
Preview Multiple Files
Free MS Outlook OST file viewer help users to preview multiple OST files with all its contents and other properties like: From, Subject, To, Sent, Got date and Size in bytes
The OST data viewer tool cum reader is loaded with one of the fastest scanning feature. Which lets it to scan some of the largest MS Exchange OST files without any hassle.
The software has been designed for both technical and non-technical users. The user-interface has been kept simple and easy to use.
Being an advanced application, it has been designed to remain compatible with all versions of MS Windows OS and Outlook versions.