Efficiently Import OST Files into Thunderbird With Simple Steps

Are you also tired of the corruption problem with Outlook and want to migrate all of its data? Then we are there to help you. You can migrate Outlook data to Thunderbird. So, in this write-up, we will detail the methods to import OST to Thunderbird.

You may be wondering why I recommend moving your Outlook data to Thunderbird only. The decision to favor Thunderbird is driven by a variety of factors. Here are some justifications for importing OST files into Thunderbird.

Why Import the OST file to Thunderbird

There are a few reasons for preferring Thunderbird. Below is a list of some of them.

  • To begin with, Thunderbird is a free program, whereas Outlook is a paid one.
  • Outlook saves its files in OST and PST format, which are accessible in Outlook only. While the Thunderbird supports the MBOX format. Which is supported by many email clients like Gmail, Apple Mail, etc.
  • OST and PST files are supported by Windows only. Whereas the MBOX is supported by both Windows and Mac.
  • Outlook files are prone to corruption, but MBOX files are free from all these rid.

Consequently, these are a few benefits of Thunderbird over Outlook. Therefore, many of the users looking forward ways to import OST files into Thunderbird.

Import OST to Thunderbird With a Traditional Approach

Well, we regret to inform you that there is no direct conventional method available to migrate OST to Thunderbird. If available, that will be a daunting task. For this, you need to execute the stages.

Stage 1: Convert OST to PST

Stage 2: Import the modified PST data into Offline Outlook once more

Stage 3: Migrate the complete Outlook Account to Thunderbird

Let’s unleash the stages in detail to open the OST file in Thunderbird.

Stage 1: Convert OST to PST.

  • Access Outlook and move to the File tab.
  • On the Account Information Page, go to Open & Export > Import/Export.
  • Choose the Export to a File option from the choice list.
  • Under the Create a File of Type menu, choose Outlook Data File (.pst).
  • Select the folder to export in PST format.
  • Browse the location for the resultant file.
  • Manage the Duplicate options and click the Finish button.

After the OST to PST conversion, import that PST into Outlook again.

Stage 2: Import the modified PST data into Offline Outlook once more

  • In Outlook, go to the File tab.
  • Select the Open & Export option and then move to Import/Export.
  • Choose the Import from another program or file option here.
  • Decide the file type as Outlook Data File (.pst) to import.
  • Browse to the location where you last saved your PST file.
  • After managing the available options, click the Finish button.

Once the offline version of Outlook has imported the chosen PST file. Move on to the following step to import OST to Thunderbird.

Stage 3: Migrate the complete Outlook Account to Thunderbird

In this stage, your entire Outlook profile will migrate to Thunderbird. You can choose either of the parts from the profile. For this, take the below steps.

  • In the Thunderbird application, go to the Tools option.
  • Select the Import option from the list under the Tool menu.
  • Next, on the Import Tool page. Select the Import from Outlook option.
  • Then select the data you want to import from Outlook.
  • After deciding on the data to import, click the Start Import option.

That’s how the OST file is opened in Thunderbird.

As the method itself states, it is time-consuming and lengthy. Additionally, the majority of the time when performing this migration task, PST files become corrupted, so using this method requires highly technical expertise. But how would you react if I told you that you could easily transfer your OST files to Thunderbird without losing any of your data?

As a result, specialists have developed an automated Sysinfo OST to PST converter. A brief discussion about this tool will follow.

Quickly import the OST file into Thunderbird

The method described above demonstrates the numerous obstacles that must be overcome at each step. Even after the migration, we are not confident that we have successfully transferred our Outlook data to Thunderbird. Therefore, using an automated solution to import OST files into Thunderbird is the wisest choice.

OST to PST Converter is a feature-rich solution that converts a single or bulky OST file to PST in just a moment without losing its data or hierarchy. Additionally, you can migrate emails, contacts, journals, tasks, and notes to other available saving formats. Furthermore, you have various options to change and migrate your OST file to different email clients. With the help of the below steps, you can migrate OST to Thunderbird.

Easy Steps to Import OST to Thunderbird

  • Download the  OST to PST Converter.
  • Add the OST files, and preview the details present in them.
  • Choose the saving format as Thunderbird from the drop-down menu and enter its detail in the tool.
  • Manage the other cutting-edge features of the utility.
  • Assign the name and destination for the resultant file.
  • Click the Convert button, and your added OST file will migrate to Thunderbird.


This write-up explains the method to Import OST to Thunderbird with a manual and professional approach. However, using the manual method does not guarantee a successful migration. On the contrary, a professional tool is loaded with advanced features that not only migrate Outlook OST to Thunderbird but also allow you to migrate it to other email clients. Moreover, it enables you to save it in 15+ file formats and utilize other sophisticated features.

About The Author:

Amrita Yadav is a content writer in the field of Email Migration, Data Recovery, Email backup, and File Management. I started this writing career two years back. I think the vast range of information in this industry is the reason I am so fascinated to read about the newer techniques and technology.

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