How to convert an OST file to PST format?

AlbertTaylor   |   29 June, 2026

An OST file allows Microsoft Outlook users to work offline with Exchange Server, Microsoft 365, or IMAP accounts. However, if your Exchange account becomes inaccessible, the OST file cannot be opened directly on another system. In such situations, converting the OST file to PST format becomes essential. PST files are portable, easily accessible in Outlook, and ideal for backup, migration, and data recovery.

This article explains both the manual method and the professional Shoviv OST to PST Converter for converting OST files to PST format.

Manual Method to Convert OST to PST

If your Outlook profile is active and connected to the original mailbox, you can use Outlook's built-in Import/Export feature.

Step 1: Open Microsoft Outlook

Launch Outlook using the profile associated with the OST file.

Step 2: Open the Import/Export Wizard

• Click File > Open & Export.

• Select Import/Export.

Step 3: Choose Export Option

Select Export to a File and click Next.

Step 4: Select PST Format

Choose Outlook Data File (.pst) and click Next.

Step 5: Select Mailbox

Choose the mailbox or folder you want to export. Enable Include subfolders if required.

Step 6: Save the PST File

Browse to the desired destination, provide a file name, and click Finish.

The OST mailbox will now be exported to PST format.

Limitations of the Manual Method

Although the manual approach is free, it has several drawbacks:

• Requires Outlook installation.

• The Exchange or Office 365 account must still be accessible.

• Cannot convert orphaned or inaccessible OST files.

• Time-consuming for large mailbox data.

• No option to export into multiple formats.

• No advanced filtering or selective migration.

Because of these limitations, professionals often prefer dedicated OST conversion software.

Convert OST to PST Using Shoviv OST to PST Converter

Shoviv OST to PST Converter is a professional solution designed to convert healthy, damaged, encrypted, or orphaned OST files into PST without data loss. It preserves the original folder hierarchy, email formatting, metadata, and attachments throughout the conversion process.

The software also allows users to export OST data into multiple formats, including PST, EML, MSG, HTML, Office 365, and Exchange Server.

Steps to Convert OST to PST Using Shoviv OST to PST Converter

Step 1: Install and Launch the Software

Download, install, and open the Shoviv OST to PST Converter on your Windows computer.

Step 2: Add OST File

Click Add OST File and browse to select the OST file you want to convert.

Step 3: Preview Mailbox Items

The software scans the OST file and displays all mailbox folders such as Inbox, Sent Items, Contacts, Calendars, Notes, and Tasks for preview.

Step 4: Select Export Option

Choose Export to PST from the available export options.

Step 5: Configure Export Settings

Specify the destination folder for the PST file. You can also apply filters based on date range, folder selection, or item type if needed.

Step 6: Start the Conversion

Click Export to begin the conversion process. Once completed, the PST file is ready to open in Microsoft Outlook.

Key Features of Shoviv OST to PST Converter

• Converts healthy, damaged, and orphaned OST files.

• Maintains complete folder hierarchy and email properties.

• Supports PST, EML, MSG, HTML, Office 365, and Exchange export.

• No Outlook installation required.

• Converts large OST files without size restrictions.

• Offers date-based and folder-based filtering.

• Supports all Outlook and Windows versions.

• Fast, secure, and user-friendly interface.

Conclusion

While the manual method works for users who have access to their original Outlook profile and Exchange account, it becomes ineffective when dealing with orphaned or corrupted OST files. In such cases, Shoviv OST to PST Converter provides a reliable, efficient, and feature-rich solution. Its ability to convert OST files without Outlook, preserve data integrity, and support multiple export formats makes it an ideal choice for both individual users and IT professionals.