Cigati OST File Viewer

Cigati OST File Viewer is a powerful and intuitive software designed to open, view, and analyze Outlook OST (Offline Storage Table) files without requiring Microsoft Outlook or an Exchange Server installation. Whether your OST files are orphaned, inaccessible, corrupted, or simply need examination, this tool provides a reliable and seamless solution to preview emails, attachments, contacts, calendars, tasks, and more—all without modifying the original file.

This viewer is ideal for IT professionals, forensic investigators, administrators, and everyday users who need to access OST data quickly and securely—even when Outlook is unavailable or offline.

Key Features

View OST Files Without Outlook

Browse and read OST file contents independently, no Outlook installation required—perfect for environments without Exchange or Outlook.

Preview Complete Email Details

Instantly preview emails with full metadata—including sender, receiver, subject, date, body, and attachments—maintaining the original structure.

Supports Damaged & Orphaned Files

Safely load and view data from corrupted or orphaned OST files that Outlook cannot open.

Multiple View Modes

Explore OST contents in different view formats, such as list view, content view, and message properties, with easy navigation.

Batch File Support

Open and examine multiple OST files at once for efficient analysis and review.

Large File Handling

Designed to perform efficiently with large OST files without performance degradation.

User-Friendly Interface

Clean, intuitive UI makes it simple for users of all experience levels to view OST file contents with minimal effort.

Why Choose Cigati OST File Viewer?

• Export Capability – Optionally save or convert viewed data into multiple formats, including PST, PDF, MBOX, EML, MSG, and CSV.

• No Outlook Required – Works standalone, eliminating dependency on Microsoft Outlook or Exchange.

• Safe and Read-Only Mode – Ensures original OST files remain unchanged during viewing and analysis.

• Comprehensive Data Access – View emails, contacts, calendars, tasks, notes, attachments, headers, and folder hierarchy.

• Faster Results – Quickly load and browse OST files with responsive performance.

• Suitable for All Users – From technical professionals to casual users, no specialized skills required.

Typical Use Cases

• Analyze employee OST files during audits or investigations.

• Retrieve data from OST files when the Outlook profile is inaccessible.

• Preview and extract important email content for compliance or reporting.

• Enable OST file access on systems without Microsoft Outlook installed.

Technical Specifications

• Operating Systems: Compatible with Windows 11, 10, 8.1, 8, 7, and all earlier versions.

• Outlook Compatibility: Supports OST files generated by Microsoft Outlook 365, 2021, 2019, 2016, 2013, 2010, and 2007.

• Pricing Model: Free to view/preview; licensed versions available for advanced export needs (up to 50 items in the demo).

How It Works

1. Install and Launch the Cigati OST File Viewer.

2. Browse and add one or more OST files from your local system.

3. Explore Mailbox Data through a structured folder tree.

4. Preview Messages including attachments and metadata.

5. Analyze or Export items as needed for reporting or investigation.