Wednesday 27th August 2025

Do you want to convert your OST file into PST file, but there is no Outlook installed on your system? Don’t worry, in that case, you are in the right place. In this post, we will discuss the best way to convert OST to PST without Outlook. Continue to read and complete the OST to PST conversion.

Have you ever tried to open OST file without Outlook application? If yes, then you must know that it’s not possible. The more challenging part is, if the OST file that you are trying to convert is orphaned.

Don’t worry, in this post, we will discuss the best way to change OST to PST format without Outlook. This guide also includes the step-by-step process of OST to PST conversion and measures you take for a smooth email exporting.

Things to Do Before Starting the Conversion

There are a few steps you need to make sure to follow before convert OST to PST without Outlook. Here are the things –

  • Firstly, find the OST file location in Windows. Here is the path –C:\Users\YourName\AppData\Local\Microsoft\Outlook.
  • Make sure you have an exact copy of your OST file.
  • Check the size of the OST file; if it is large, then rely only on expert tools.
  • Confirm account type — Exchange/IMAP. There is a chance that they may be allowed server-side recovery.
  • An important task is to backup your OST file data before you start the conversion.

Now, here are the steps to export OST emails to PST file without Outlook installation.

How to Export OST File to PST Without Outlook?

Here are a few solutions for the OST to PST conversion without needing Outlook. Look at them and choose which one you find right for you.

1. Convert OST to PST without Outlook

If the OST file you are trying to convert is not from the same profile or Outlook is not in use, then you need a secure tool. BLR OST to PST Converter Software is the best way to convert emails from orphaned and inaccessible OST file data. The software will effortlessly convert your emails without affecting data integrity. All you need to do is add the OST file and choose the PST as an export option. Most importantly, your data will be secure while converting emails. Experience the conversion process with the software demo version.

With this tool, there are various prominent features –

  • Easily convert not accessible OST file into PST without any data loss.
  • Allows to selection of the email folders for selective conversion.
  • Preview option to view emails before converting them.
  • Maintain email folder and sub-folder hierarchy and structure.
  • Secure and efficient interface for better conversion.
  • Break your resultant PST file into small parts.

download free software

Here are the simple steps to convert OST to PST without Outlook –

  1. Run the BLR OST to PST Converter Tool on your system.
  2. Click on Add file to upload the OST file.add the ost file
  3. Choose the email folder to convert them.select email folders
  4. From the export option, choose the PST file.convert ost to pst without Outlook
  5. Browse the saving location and hit the Export button.convert ost fiel to pst without outlook

Done! Here you takeout OST emails to PST file in a few simple clicks. After that, you can use the data emails with ease. Using this tool, you can also move OST file to Office 365 mailbox as well.

Method 2: Using Exchange Admin (for office IT or admins)

If your company is still using Exchange Server and you are an admin (or can ask IT), follow the steps –

  1. Log in to the Exchange Admin Center (web panel for admins).
  2. Pick the mailbox you want to export.
  3. Select Export to PST.
  4. Choose where to save it (usually a shared folder or network location).
  5. Download the PST once it’s ready.

convert ostto pst using Exchange Admin center

You can also use the eDiscovery tool of Microsoft 365. Here are the steps –

  1. Go to the Microsoft Compliance Portal online.
  2. Create a search for the mailbox you want to export.
  3. Run the search, then click Export to PST.
  4. Download the file with Microsoft’s export tool.

Export OST File to PST Without Outlook

Done! Here are the manual steps for OST to PST conversion without Outlook installation. However, these manual solutions required technical knowledge or assistance. However, using the export tool, you can easily complete the process without any hassle.

Common Problems Faced When Convert OST to PST

  • OST file is damaged and won’t open: A corrupted or damaged OST file can be difficult to handle, a single mistake nd you lose years of your data. Find a secure and efficient tool that can handle the damaged OST file.
  • Large OST File: If your OST file has lots of data, then your PST file will be big in size.  So split the PST into smaller parts during export.
  • Data Missing: If not use the correct method to convert OST to PST without Outlook, then some of the data can be missing. Find the right solution for you and export your data.
  • Free Solutions are risky: If you are looking for a free way to convert .ost to .pst without Outlook, then it can risk your data. Try to use a secure and efficient solution that can handle your data securely.

Conclusion

When exporting OST to PST without Outlook, you can face many challenges. Here in this post, we suggest the best and effective solutions for you. For instant results, you can use the export tool. If you are an admin and an IT person and know the technicalities, then you can opt for manual solutions. Find the right solution for you.

Hope this article will be helpful for you and help you in effortless OST to PST conversion.