How to Open OST file in Thunderbird ?

Rollins Duke   
Published: April 25th, 2023 • 6 Min Read
Summary: Hassled with the manual approaches to open OST file in Thunderbird? Are you stuck in a situation where you have a folder having many OST files and want to view Outlook offline OST file in Thunderbird without Outlook? If yes, this blog will surely help you out! Read this entire write-up to know how to read Outlook OST file in Thunderbird in batch.

Switching from one email client to another is no more complicated now. Though there are numerous manual solutions available for doing so, it is a little bit techie. Today, business organizations as well as for other personal uses, the individuals prefer to work with a free email client such as Thunderbird, However, the dilemma arises when the users are unable to move their data from one email client to another. Recently, our technical team received a query from a client where the user wants to open OST file in Thunderbird:

I am currently working for an IT MNC Company where almost all co-workers and management use Microsoft Outlook 2016, 2013, 2010 versions. Due to some reason, I have decided to shift to another job location but all my crucial emails are stored in MS Outlook in OST (Offline Storage Table). Now, I want to open OST file in Thunderbird application. The main reason is that Thunderbird is a freeware email client and I don’t want to spend money on purchasing any email client. Along with emails, there are few attachments that are embedded with it. Can someone please suggest me a workable solution so that I can open Outlook OST file in Thunderbird. Your help will be really appreciated!

– Austin, USA

The above scenario clearly shows that the user wants to view Outlook offline OST file in Thunderbird, but unable to get the right clue. Thus, you should trust a reliable automated solution. BitRecover OST Converter is one such tool that enables any user to open OST file in Thunderbird effortlessly. So, without wasting much time, let’ s see in some simple steps how to open Outlook offline OST file in Thunderbird.

Download for Windows     Download for Mac

How to Open OST File in Thunderbird ?

How to Open Outlook OST File in Mozilla Thunderbird ?

Follow these steps to know how to open OST file in Thunderbird:

  • Step1: Run the software on Windows OS and Choose desired OST files.
  • Step2: Check the preview of all Outlook OST emails with attachments.
  • Step3: Select Thunderbird as a saving format from the utility.
  • Step4: Choose a destination path and Press on the Convert tab to begin the process.
  • Step5: Lastly, Start Thunderbird to move Outlook offline OST file.
Note: Learn How to Open PST files in Thunderbird ?

How to Read OST File in Thunderbird Without Outlook ?

Before you start this process, please ensure that Mozilla Thunderbird is properly configured on the system.

The first step is to install the complete setup of the software. Thereafter, run it and read all the instructions carefully.


Now, browse or search Outlook OST offline files from your database to start this process. You can pick OST files in two ways:

Select OST files: Choose single or multiple OST data
Select OST folders: Choose the OST folder consisting of multiple OST files.


Here the time comes to check the preview of all OST emails with their associated attachments. Enables those check-boxes whose data you want to open in Thunderbird.


Navigate to saving options tab and Choose Thunderbird as a file saving format to move towards the next step.


Once you have done the conversion, now, you can pick a target path where you want to save the resultant output data.


Lastly, Hit on the Convert button to end the task. This conversion will finish in a few seconds. You can see the live conversion progressive report during the process.


Once all the steps complete, this message will flash on the screen “Conversion completed successfully”. The software will automatically open the default location where your OST emails are saved.


Finally, you can start the Mozilla Thunderbird application. Now, you can open OST file in Thunderbird with all attachments.


 View OST Files in Thunderbird – Prime Features of Software

Open OST file in Thunderbird in Batch – With the usage of this software, one can read multiple OST files in a single folder and load it for conversion into Thunderbird.

Move OST emails with attachments – During this conversion process, you don’t need to worry about attachments. The tool will open OST file in Thunderbird with respective attachments.

Migrate OST data with exact formatting – During this conversion process, there is no loss of originality of data. The utility will automatically read Outlook OST files in Thunderbird with preserved email components like Subject, To, From, font formatting, hyperlinks, etc.

Multiple Options to import OST files – The user has the freedom to select the desired option for loading OST items into the software panel. With Select Files, you can add desired OST files and with Select Folder option, you can load the entire Outlook offline data file folder.

No requirement to install Outlook – Using this wizard, the user need not to install MS Outlook for the entire process. One can even open OST file in Thunderbird without Outlook with this tool.

Why Do We Need to Read OST Emails in Thunderbird ?

There are multiple reasons that compel users to move Outlook OST file in Thunderbird. Some of the mOST highlighted reasons are described below:

Best for Personal Use: MS Outlook is a widely known email client service that comes up with MS Office pack. However, various organizations don’t prefer to use it as it is costly. Mozilla Thunderbird, on the other hand, is a freeware and open-source email client thus, individuals want to open OST file in Thunderbird.

Cross-platform availability: Thunderbird is available for various platforms such as Windows, Linux, macOS, Unix, BSD.

Data Compatibility: If users have OST emails in their system and want to access them in Thunderbird they can simply, download this software. It will efficiently open OST file in Thunderbird.

Final Thoughts

In the above blog, we have described an all-in-one solution to open OST file in Thunderbird without Outlook installation. You can even try the demo version of this tool to evaluate the proficiency of software. This demo edition allows migrating the first 25 items from each OST folder to a selected format or email service. Once you test the tool’s efficiency, switch to the full pro version of the tool. It permits to read OST data in Thunderbird without any limitations. If you still have any queries regarding this, you can contact our technical team which is available free of cost.