Different Methods to Convert OST to PST for Outlook

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Convert OST to PST

Are you not able to see your emails due to problems related to the OST file in Outlook? If so, it could be because of the offline mail servers and even corruption.

So, whatever the main source of the issue, it is advisable to convert OST to PST. It offers you an incredible chance to access your emails once again.

As not everyone knows how to convert OST to PST, we will here discuss the methods in detail. So, let’s get started without further ado.

PS: here, you will learn more about how to download scanpst.exe.

Part 1: Reasons Why to Convert OST to PST

If you are wondering why there is a need to convert OST to PST, then there are lots of reasons for the same.

Here, we are going to tell you about some of the most reasons why people think of converting .OST to .PST in the first place. So, have a look at some common reasons below!

  • If users like to transfer Outlook data or files to another system, they need to convert OST to PST.
  • In case the server of Microsoft Exchange experiences a high-power rush or is down due to some maintenance work, users cannot access their emails lest they choose to convert OST to PST.
  • Users who like to recover deleted emails can do so by opting for the conversion from .OST to .PST.
  • On rebuilding the OST file in Outlook, you will be able to delete the junk files, which will slow down this program. If you convert OST to PST, it ensures that no significant data gets lost during the rebuilding process.

So, these are some of the common reasons for which you may require converting .OST to .PST. Not just these, but there are other technical reasons too. But users get the gist!

Besides, if you are facing issues like Outlook keeps crashing or Outlook’s invalid.xml error, click to read more.

Part 2: Different Methods to Convert OST to PST

Now, we should move to the primary question: how to convert OST to PST? If you are in search of an answer to this question, keep on reading.

Here, we will discuss some of the best methods to carry out this conversion process.

Method 1: Convert OST to PST through Import/Export

Outlook comes with an in-built feature, using which you can export OST files and convert them to PST effortlessly. So, let’s know how to do it!

Steps through Import/Export:

  • 1: Launch Outlook and then log into your account if you have not already.
  • 2: Select the tab ‘File‘ and choose the option ‘Import/Export‘ from the tab ‘Open & Export.’
outlook open export
  • 3: Out of all options, choose ‘Export to a file‘ and hit the ‘Next‘ tab.
outlook export to a file
  • 4: Next, select ‘Outlook Data File‘ from the options listed there. After that, click on the ‘Next‘ tab.
  • 5: Now, you can choose the folders you like to export from the data file of emails. Move to the tab ‘Next‘ after doing so.
outlook select exported contact
  • 6: Finally, select a location for saving the file and look for the duplicate setting. Once done, tap on ‘Finish.’

Also, are you facing the Outlook email view change issue? Here, we will state the possible reasons, and effective fixes for the Outlook view changed.

Method 2: Convert OST to PST through the Archive

There is another in-built feature that enables users to convert OST to PST, which is Archive.

Steps through Archive:

  • 1: Run Outlook and choose the tab ‘File‘ present at the top.
  • 2: Look for the tab ‘Option‘ and go to ‘Advanced.’ After that, select the settings called ‘AutoArchive.’
outlook options autoarchive
  • 3: Choose a folder for converting to PST. If necessary, you can even set an exclusion over ‘Archive items older than.’
  • 4: Select a folder where you like to keep the PST file under the tab ‘Archive File.’
  • 5: Finally, hit the tab ‘OK,’ and your OST file will be successfully converted to PST.
autoarchive settings

So, this method will convert your file even though this feature is commonly used to create backups of Outlook OST files.

Method 3: Convert OST to PST through Online Converter

It is quite obvious that when people think of converting a file, they usually use an online converter to carry out the task.

The same thing applies when it comes to converting OST to PST. If you are looking for an online solution, OSTtoPST.online is the perfect one.

  • 1: Visit a web browser and search for OSTtoPST.online.
  • 2: Tap on ‘Select File‘ and choose the file that you like to convert to PST.
  • 3: Put your email ID into the given column and hit the ‘Next Step‘ tab.
  • 4: The file will get uploaded, and then it will be converted to the desired format.
OST to PST Online Converter
  • 5: After the conversion process gets over, you can download the file and use the option ‘Import/Export‘ for using the same in Outlook.

Unfortunately, some disadvantages are associated with this online method. Firstly, your email data will be at risk of privacy leaks. Moreover, it is quite time-consuming and difficult to upload bigger files.

Method 4: Convert OST to PST through Drag/Drop

The last method for converting .OST to .PST is through Drag-Drop. One can perform this task right on Microsoft Outlook. Plus, the method is relatively straightforward. Have a look at it below!

Steps through Drag-Drop:

  • 1: Open Microsoft Outlook and then choose the option ‘New Items‘ from the toolbar.
  • 2: Under the tab ‘More Items,’ select the ‘Outlook Data File.’
create new item outlook
  • 3: Next, give your file some name and password if desired and hit ‘OK.’ afterward.
  • 4: Drag the email folders into your newly created PST data if it appears for creating an .PST file.

As compared to the in-built feature in Outlook that enables you to convert OST to PST, this method would not let users have the contact information or their inbox in the PST file.

Best Practices for OST to PST Conversion

When converting OST files to PST, it’s essential to follow some best practices to ensure a smooth and error-free process. Here are a few tips:

  1. Backup Your OST Files: Before starting the conversion, make sure to create a backup of your original OST files. This ensures that you have a copy of your data in case of any unforeseen issues.
  2. Choose the Right Conversion Method: Consider the size of your OST file, your technical expertise, and the specific requirements of your conversion. Select the method or tool that best suits your needs.
  3. Verify the Data Integrity: After the conversion process, verify the integrity of the converted PST file by opening it in Outlook and checking if all data is intact.
  4. Keep an Eye on File Size: PST files have a size limit imposed by Outlook. If your OST file is large, it may exceed this limit during conversion. In such cases, consider splitting the PST file into smaller parts.


1. Can I convert OST to PST without using third-party tools?

Yes, you can convert OST to PST using Outlook’s built-in Import/Export wizard or the archiving feature. However, automated tools provide more flexibility and efficiency in handling large or multiple OST files.

2. Are there any limitations to PST file size?

Yes, PST files created by Outlook versions prior to Outlook 2003 have a maximum size limit of 2GB. In later versions, the limit was increased to 20GB for Unicode-format PST files.

3. Can I convert an encrypted OST file to PST?

Encrypted OST files cannot be directly converted to PST format. You need to decrypt the OST file first before proceeding with the conversion process.

4. Are there any risks involved in the OST to PST conversion process?

When converting OST files to PST, there is a slight risk of data loss or corruption. It is recommended to create a backup of your OST files and carefully follow the conversion steps to minimize these risks.

5. Can I convert OST files from a different Outlook version to PST?

Yes, you can convert OST files from different Outlook versions to PST format. However, ensure that you choose a compatible conversion method or tool that supports the specific Outlook version you are working with.

Final Words

So, these are some incredible methods to convert OST to PST. After converting your files, you will not face any issues. It is advisable to go with Stellar Repair for Outlook.

The program is the best solution compared to other methods, allowing you to save numerous emails. This feature is perfect for users who like to access the entire account.


Ten years of experience in information and computer technology. Passionate about electronic devices, smartphones, computers, and modern technology.

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