How to Convert Thunderbird to Outlook PST free?

Last updated on January 18th, 2021 at 04:54 pm

Mozilla Thunderbird is an Open-source email application. Thunderbird stores all emails items in two different file formats EML and MBOX. But the Microsoft Outlook has no feature to directly import or access EML and MBOX file format. In order to access Thunderbird emails in Outlook user have to convert Thunderbird items to a Outlook supported file format. In this blog we will discuss the method to Convert Thunderbird to Outlook PST free.

Notes:- The Free or manual methods are supportive of a limited period and even have many drawbacks. So, it is recommended to use the automated tool I.e. eSoftTools Thunderbird to PST Converter tool for doing perfect conversion of Thunderbird profile to Outlook.


Now, coming to the main question, how to convert Thunderbird to Outlook PST free ?

Manual Process to Convert Thunderbird to Outlook PST free

Step 1:- Export emails from Thunderbird

  • Run Mozilla Thunderbird.
  • Open the messages folder and select the messages that you want to export according to your requirement.
  • Right-click on selected messages and choose the ‘Save As’ option from the menu.
  • Choose a folder and save the messages in EML file format on this folder.

Step 2:- Import Thunderbird emails into Windows Live Mail

  • Launch Windows live mail application
  • Select an Existing folder or Create new folder
  • Now open the Windows Explorer then visit to folder of Thunderbird email items.
  • Drag and drop all these file with .eml extension one by one in Windows Live Mail.

After completing this process, convert windows live mail emails to pst file

Step 3:- Export emails from Live Mail to PST

  • Again open Live Mail application on your windows machine
  • Click on File >> Export email >> Email messages
  • Then select Microsoft Exchange option, and choose the folder to export then click OK.
  • An Export Messages dialog box will now appear on your screen.
  • Select Outlook from the provided profile and click OK to start the Export process of Thunderbird emails to PST file.

Now simply import the created PST file in MS Outlook through import/Export wizard. After this all the Thunderbird emails will appear on MS Outlook and the import process is complete.

Fastest solution to Convert Thunderbird to Outlook PST free

The manual method to do the Thunderbird emails to Outlook Conversion is a very lengthy process. To make this task more reliable and smooth eSoftTools has recently launched an application known as Thunderbird to Outlook Converter Software. This tool has been developed with graphical user interface and interactive design. So conversion from Thunderbird to Outlook will be easier. You just need to select the required folders and click on the Export button and then your file will be automatically converted to Outlook

  • Download the eSoftTools Thunderbird to Outlook Converter application.


  • Now launch it on your computer.
  • Search for the desired Thunderbird files which are to be converted.
  • Then scan the Thunderbird files and get a proper preview of all email items.
  • After that, select the file type as PST and click on convert button to continue the process on Thunderbird to Outlook Conversion.


As known by the question, there are multiple ways to convert Thunderbird to Outlook PST for Free. But coming to the manual method, the files may lose important databases or if they are oversize files, then it may crash down. Regardless of these drawbacks, it is asked to follow the automated tool by eSoftTools.

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