OST Viewer: Open Outlook OST Files Without Outlook

OST Viewer software to view, open and read OST files instantly.

**FREE DOWNLOAD (v1.2)** File Size: 1978KB | Safe & Verified
Utilities File Managers Freeware

Key Features

  • Free OST viewer tool to help you view OST files easily without connecting to MS Exchange Server.
  • Administrators often face the heat of the situation when they have to look out for some important data in OST.
  • Unfortunately, there is no such software or utility offered by Microsoft.

Technical Specifications

  • **Publisher:** Ostviewer.com
  • **License:** Freeware
  • **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
  • **Last Updated:** October 15, 2025
  • **Category:** Utilities / File Managers

User Rating

Based on 82 reviews.