SysInfo PST Viewer

SysInfo PST Viewer is a powerful and reliable solution designed to open, read, and preview Outlook PST files without requiring Microsoft Outlook installation. It enables users to access healthy, corrupted, orphaned, empty, oversized, and password-protected PST files directly on their Windows systems. The software provides a secure, read-only environment that ensures the original PST files remain unchanged throughout the viewing and exporting process.

The tool supports both ANSI and UNICODE PST files created by Microsoft Outlook versions from 1997 to Outlook 2024 (LTSC) and Microsoft 365. Users can load single or multiple PST and OST files simultaneously through automatic Outlook profile detection or manual file browsing. It also supports viewing essential mailbox components, including emails, contacts, calendars, tasks, notes, journals, drafts, RSS feeds, attachments, and conversation settings while maintaining the original folder hierarchy.

SysInfo PST Viewer offers advanced email preview capabilities, allowing users to examine message bodies, attachments, headers, MIME content, and raw HTML. Its advanced search functionality helps locate specific emails using sender, recipient, subject, date range, and attachment-based filters. Users can preview up to 20,000 emails at once and access detailed mailbox information without depending on Outlook or an active email profile.

For additional flexibility, the software allows users to export PST data into multiple formats, including PST, EML, MSG, MBOX, PDF, and CSV. It also supports direct PST migration to Office 365 using OAuth 2.0 modern authentication and Admin Impersonation. Additional options include date-based filtering, duplicate email removal, custom folder naming, attachment management, file splitting, and skip-and-resume functionality for interrupted exports. Users can generate detailed log reports to monitor and verify export operations.

The software operates offline without uploading confidential mailbox data to cloud servers, providing greater control over sensitive email information. Its multilingual interface supports English, French, German, Italian, Spanish, and Japanese. Compatible with Windows, macOS, and Linux availability, it offers flexible access across different computing environments.

SysInfo PST Viewer is suitable for IT administrators, system engineers, legal professionals, forensic investigators, compliance officers, and individuals who need to inspect, access, or export Outlook mailbox data. Its free demo version allows users to preview files and export up to 100 emails per folder. With Single, Admin, Technician, and Enterprise editions, it provides flexible options for different user requirements.