03 Instant Ways to Convert OST to PST Without Outlook

Convert OST to PST Without Outlook

Last Updated on May 8, 2023 by Team Experts

As an Outlook user, you may know about the OST and PST files. OST files are offline copies of Outlook emails. Whereas, the PST files are the Outlook data files present on the configured system. If the Exchange server crashes or goes under maintenance, or in the case your OST files get inaccessible, you can’t open the OST files. There are various such reasons which insist users export OST to PST Outlook 365. So, this guide explains the three traditional ways and a professional way to convert OST to PST without Outlook. We will also discuss the automated solution using the best OST to PST Converter.

Manual Solutions to Convert OST to PST File

There are three manual ways to convert OST to PST. 

  1. Export Outlook mailboxes as a PST file.
  2. Archive OST files in PST format.
  3. Drag & Drop the OST files into PST format.

Let’s discuss each method step-by-step. First, log in to your Outlook account and follow the methods mentioned below. 

Solution 1: Export Outlook Mailbox as a PST File

You can copy OST to PST by exporting the Outlook data to a PST file. Let’s find out how:

  1. Open Outlook and go to the File tab. 
  2. Select the Open & Export option and click Import & Export.
  3. Click Export to a file and hit the Next button.
  4. Choose the option Outlook Data File (.pst) and click Next.
  5. Select the folder that you want to export, and proceed with Next.
  6. You can also include the subfolders to migrate.
  7. Browse the location where you want to save the files.

If you’ve already tried it or want another solution, move on to the next paragraph.

Solution 2: Archive OST Files in PST Format

You can also archive the Outlook OST files in PST format to convert OST to PST. Let’s discuss the process in detail:

  1. Run Outlook and go to the File menu. 
  2. Click Options and go to the Advanced tab.
  3. Click Auto Archive Settings and select the number of days to auto-archive the data.
  4. Choose the destination folder to save the PST file.
  5. Finally, click the OK button.

Solution 3: Drag & Drop the OST Files into PST Format

If the above solution didn’t work, you can try this method. Here we will learn how to drag the OST files into the PST format. 

  1. To create a new PST file, go to the Home tab and click New Items.
  2. Go to More Items and select the Outlook data file.
  3. Choose the Outlook data file (.pst) from the list and click OK.
  4. Drag the required files from the Outlook account and drop them into the newly created PST file.
  5. If it asks you to confirm the action, click the Yes button.

The above-described solutions are free, and anyone can use them. But you should be aware of the issues you may face by following the manual solutions. Let’s jump to the next section to learn about its limitations in detail.

Limitations of Using Manual Methods to Convert OST to PST Outlook

There are various disadvantages to using manual methods. Some of them are listed below:

  • The process includes the risk of data loss, which may corrupt your files.
  • Using this solution can’t convert OST to PST without Outlook.
  • There are high chances of data alteration in the manual technique.
  • You should need technical skills to convert the files perfectly.
  • Your files may be corrupted or damaged during the conversion process.
  • It doesn’t support converting corrupted files.
  • You may face issues while converting large OST files. 
  • It doesn’t transfer all email items.

Due to such limitations, professionals suggest using the OST to PST Converter. It is a quick and risk-free solution that allows you to convert multiple OST files to PST with data integrity. This automated solution doesn’t require technical knowledge to perform the task. Moreover, it provides 100% data accuracy and no data loss during the conversion process. Let’s conclude the complete blog in a few words.


In this article, we have discussed three traditional ways to save OST as PST. Well, it is free but requires sound technical skills. If you are a good techie, you can go for the manual methods. But, if you don’t want to take the risk of data loss, I would recommend choosing a professional solution that allows you to convert OST to PST without Outlook. Now the choice is yours. Hope you enjoyed the article and found it helpful.

Read more: Top 02 Solutions to Convert EDB to PST in 2023


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Anil is an enthusiastic, self-motivated, reliable person who is a Technology evangelist. He's always been fascinated at work especially at innovation that causes benefit to the students, working professionals or the companies. Being unique and thinking Innovative is what he loves the most, supporting his thoughts he will be ahead for any change valuing social responsibility with a reprising innovation. His interest in various fields and the urge to explore, led him to find places to put himself to work and design things than just learning. Follow him on LinkedIn

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