View, search, and export email messages without Microsoft Outlook The easiest way to open PST and OST files without Outlook is to use OST PST Viewer. PST Walker Viewer (pstwalker.exe) can be used as a portable application or installed as a Windows application. PST Viewer protects valuable file metadata, you can safely open an Outlook data file without leaving a digital footprint

What's New
official site does not provide any info about changes in this version.

Homepage
https://pstwalker.html