OST to PST Converter - Free Download

Export OST Emails to PST with Attachments

Tool4Mail OST to PST converter software is one of the most trusted choice for you to export OST to PST with attachments. Download the tool for free now.

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An OST file is an offline data file in Outlook that permits users to work even when not connected to the internet. In other words, an OST file is a replica of the exchange server mailbox on the local system. When working offline, all changes made to Outlook data items (emails, contacts, calendar, etc.) occur in the offline store.

The Outlook PST file is an open proprietary file format that copies of email messages, contacts, calendars, events, tasks, journals, and other data items within MS Outlook on the local system. PST file information can be easily accessed in Outlook when the personal folder file is imported into the email client.

There are several users who are trying to open OST files in another Outlook but failed. On this page, we will discuss how to open OST files on another computer with several free methods.

As we know PST file can be easily accessed in Outlook in any device. So, the user has to convert OST to PST file format first.

How to Convert OST to PST Free? - (Manually)

Import/Export Tool

With this free method, user can export OST file(s) to PST format.

Step 1. Open MS Outlook on your computer.

Step 2. Then click on the "File" Tab.

Step 3. Select "Import & Export" option.

Step 4. Click on the "Export to a file" button.

Step 5. Click on the "Next" button.

Step 6. Select Personal File Folder (.pst).

Step 7. Click on "Next" button again.

Step 8. Click on the parent root, and then choose the "Include subfolders" option.

Step 9. Then, browse and select the target folder from the system.

Step 10. Click the "Finish" button.

Drag & Drop Method

In this method, you have to create a new PST file. Then you just drag and drop your folders and save it. It is used to move OST file into PST file format.

Step 1. Run Microsoft Outlook on your desktop.

Step 2. After that create a new PST file in Outlook profile.

Step 3. Then just select and drag all the mailbox folders which you want to move into the PST format that you have created.


Step 1. First, run Microsoft Outlook in your operating system.

Step 2. Click on the "File" option button and select Archive.

Step 3. Now select the file/folder that you want to archive.

Step 4. Select the desire location to store the file into PST format.

Step 5. Click on the "Finish" button.

So, these are the manual methods to convert OST files to PST format. However, there are some drawbacks to using these manual methods.


  • Time-consuming
  • Needed same exchange account
  • You cannot convert corrupted OST file
  • Possibility of data loss
  • It will not maintain the structure of migrated data

Let us tell you a simple solution that saves both time and manual efforts. Read on…

Easy Way to Convert OST 2 PST file

I strongly recommend you to use Tool4Mail OST to PST Converter Software, In order to avoid these issues. This is an advanced tool that makes this task quick and easy without losing your data. This OST to PST converter tool is specially designed to save all emails and attachments from inbox, outbox, drafts, sent items and any other custom folder from OST to PST format.

Download the Best OST to PST Converter of 2020 to extract data from orpahn .ost into .pst file. It maintains the hierarchy of OST files during the conversion process. This software can successfully convert OST files up to 215GB.

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Steps to export OST files to PST file format

Step 1. Run Tool4Mail OST to PST Converter. Go to Open >> Email Data Files and select OST.

ost to pst converter

Step 2.Add the files and click on Export. Select PST as file saving format.

ost to pst conversion tool

Step 3. Set the desired location and hit Save button.

convert ost file to pst

Now, import converted OST file in Outlook email client. This software supports all version of Outlook including Outlook 2019.

Key Features of Tool4Mail OST to PST Converter Software

Multiple File Format

OST to PST converter software comes with multiple file format options. User has the option to convert OST file in different types of format (EML, PDF, OLM, MBOX, HTML, XML, DOC, MSG, etc.) without losing any information.

Maintain Folder Hierarchy

The OST to PST Converter properly maintains the hierarchy and integrity. The software helps to retain the hierarchy of the folder without diminishing the structure of email content from recovered OST files.

Batch Conversion

No matter how large the OST files are, the software is able to convert OST to PST format in large amount with the recovery of inaccessible emails without compromising the quality of the objects. This saves forward linked attachments to the PST file format in an easy way.

Preserve Key Elements

OST PST converter software has the ability to preserve key elements (cc, bcc, date, time, signature, attachment, hyperlink, picture, etc.) while converting OST files to PST file format. The software converts the orphaned OST file to PST without losing any of the information.

Upload to Webmail

The software has the capability to export OST files to any web-based email clients (Gmail, Thunder Mail, Yahoo Mail, etc.). it supports more than 25+ email clients without facing any issue.


OST 2 PST Converter Software supports all versions of Windows Operating System including the latest version of Windows 10. It supports Windows XP, 8.1, Vista, 8, etc. The software offers a free trial version for users to convert 25 emails from each folder.

Final Words

As we discussed the free and commercial method to convert OST to PST file format. I found that the free method has some drawbacks such as the user has no option to convert corrupt OST files, it will not maintain the structure of migrated data, it takes a longer time to export OST files to PST file format. Therefore, I personally recommend you to install Tool 4 Mail OST to PST converter software which helps you to transfer OST email in PST file format without losing any information. In addition, the software offers a free trial version for users.

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Frequently Asked Questions

How to import OST in Outlook 2019?

Most appropriate solution to import OST in Outlook 2019.

Step 1. Install and run Tool4Mail OST to PST converter in your system.

Step 2. Choose desire option “Select Files” having .ost files or “Folders” option.

Step 3. Click on browse and set the destination location.

Step 4. Click on “Convert” to begin the conversion process.

Done!! Now, import converted PST files into Outlook 2019 email client by import/export option.

Can I convert 25 GB of Outlook OST file?

Yes, the software converts OST files to PST file format without any size limitation.

Can I import OST emails in Gmail?

Yes, OST 2 PST Converter software provides an option to import OST email to Gmail account without losing any data

Is the software convert encrypted OST file?

Yes, the software OST to PST Converter convert encrypted as well as password protected Outlook files without losing any single information