How to Convert Outlook OST to PST without Outlook?

Written By Addy Wang
Updated on February 25th, 2025

When working with MS Outlook, many users encounter OST (Offline Storage Table) files. These files allow users to store data offline, syncing it with the server when reconnected. However, there are times when users may need to convert Outlook OST to PST format. Therefore, the PST file is used to backup emails, contacts, calendars, and other valuable data. In this article, we explore various approaches for this conversion or directly use the OST to PST Conversion Tool for quick and ease.

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Why Convert OST to PST?

There are several reasons for OST to PST file conversion, including:

PST Files are a great way to store important emails, contacts, and other data.
Allow users to migrate PST files into different email clients directly.
To easily access, read, and open the data without any interpretations.
It maintains data confidentiality when transferred to other platforms.

How to Export OST to PST?

In this section, we discuss various approaches to moving OST to PST. Also, discuss the limitations of the manual method and why experts suggest the professional method instead of the manual.

Method 1: Manually Convert Outlook OST to PST

Important Note: Microsoft Outlook provides a built-in feature that allows users to export data from OST to PST. To start the process, ensure that OST files are present in the MS Outlook or not, and then, perform this method. Here’s how to do it:

Firstly, open MS Outlook on your system.
Now, click on the File button and select Import/Export.
After that, choose Open & Export from the given list.
Select Export to a File and click Next.
Further, choose Outlook Data file (.pst) and press Next.
Choose the folders to export into PST format.
Lastly, specify the location and finish the process.

Limitations of the Manual Method

The manual method is only capable of small file conversion.
Require technical knowledge and a good understanding of Outlook.
Increase the chance of losing data confidentiality and integrity.

Method 2: Dedicated Software to Convert Outlook OST to PST

The OST to PST Conversion Tool is the reliable and best solution to convert OST files into PST format. With this powerful software, users can migrate OST files into different email clients like Yahoo, Office 365, and more. Additionally, this tool also allows users to convert OST to PDF, EML, EMLX, and other file formats. Along with that, it provides a simple and easy-to-use GUI for both tech and non-tech users. Moreover, it contains advanced filters such as:

Preview the file content before saving it into PST.
Remove duplicates based on your requirements.
This tool allows users to Open OST File Without Outlook.
Highly compatible with all Windows OS versions.

Steps to Convert Outlook OST to PST

First, launch the OST to PST Converter as an administrator.
Choose Single File or Multiple Files/Folders to add an OST file. Click Next.
Now, preview and select the Files or Folders and press Next.
After that, select Saving Format as PST from the drop-down list.
Apply optional features based on your requirements.
Lastly, click on the Convert button to complete the process.

Conclusion

This article explains the best tools and techniques to convert Outlook OST to PST quickly and efficiently. Whether you choose a manual method or a professional method, it’s all up to you. The manual method contains some limitations and is only capable of small file conversion. For bulk conversion, choose a professional tool.

Frequently Asked Questions

Q. How to transfer the OST file to PST?

Ans- Follow the steps:
1. Firstly, install and run the OST Conversion Tool as an administrator.
2. Now, select options to add an OST file and click Next.
3. After that, preview and select the files and hit Next.
4. Choose PST as a saving option and apply optional filters.
5. Lastly, click Convert to complete the process.

Q. Can I import OST data to PST with attachments?

Ans- By using an automated tool, you can easily import and convert OST files to PST with attachments. This tool provides options to convert Outlook OST to PST with or without attachments. Along with that, it provides advanced features like removing duplicates, previewing content, and more.

About The Author:

Addy Wang

Addy Wang is a talented content writer with a passion for creating engaging and informative articles. With a keen eye for detail and a strong command of language, Addy has the ability to craft compelling pieces that resonate with readers.