How to Import PST to Thunderbird Without Outlook?

Written By Rollins Duke Modified On September 11th, 2026 Reading Time 8 Min Read

Fact-checked and reviewed in accordance with our Editorial Policy

Want to import old, saved or orphaned PST files into Thunderbird but don’t have Outlook? Don’t worry, you can still access and import them by following the methods explained in this article. Whether you are a technical or a non-technical user, this guide covers simple and easy-to-follow steps.

Since Thunderbird does not directly open PST files, you need to use a compatible method to make your PST files data accessible. Here we have discussed how to import PST to Thunderbird, access old emails and keep the imported data available locally on your computer.

Real User Query

Below is a similar situation raised by a Thunderbird user who wanted to import old PST archive while keeping the emails stored locally.

If you have the same requirement, then you can import PST into Thunderbird’s Local Folders to keep the emails accessible on your computer without uploading them to an email server.

Why Import PST File into Thunderbird?

There are several situations where users need to import PST file into Thunderbird. Some of the most common situations include:

• Users may want to access old or inactive PST files again that contain important emails.
• To open a locally saved PST file on computer, external drive or as backup in Thunderbird.
• You have orphaned the PST file but no access to its original email source.
• Users usually import PST data to Thunderbird’s Local Folders to access them locally without uploading on an email server.
• The PST file contains old business or personal emails that you still want to open, search or manage.
• Importing PST files to Thunderbird helps to make the data accessible again without requiring Outlook.

Manual Solution to Import PST into Thunderbird for Free

Method 1: Transfer PST File using Outlook Classic

1. Open Microsoft Outlook.
2. Go to “File” now choose “Open & Export“.
   
3. Once done, hit the “Open Outlook Data File” option.
4. Select your PST files that you want to appear in Outlook.
5. After that, simply install & open Thunderbird on the same device.
   
6. Go to its Menu, choose Tools and then Import.
   
7. Next, select Import from Outlook option and click on Continue.
   
   
8. Hit the Continue button again and then press the Start Import option.
   
9. That’s it, now your imported folder will be shown in the Thunderbird’s local folders.
   

Method 2: Import PST Files into Thunderbird via Import Tool

Thunderbird supports MBOX format and can easily import data. To import PST files into Thunderbird, you first need to convert the PST file to its native format.

1. First, use the PST to MBOX Converter to convert your files.
2. Then, open Thunderbird and go to its Menu.
   
3. Click on Add-ons and Themes option, search for ImportExportTools NG and then click on Add to Thunderbird button.
   
4. Once done, right-click on the Local Folders label and select ImportExportTools NG.
5. After that, click on Import mbox Files and choose All mbox Files from directory option.
   
6. Now, load the .mbox files that your converted above.
7. You’re done. This is how you can now access PST files in Thunderbird.

Limitations of Manual Method

• Thunderbird & Microsoft Outlook email clients must be installed before importing PST files into Thunderbird via manual method.
• Free method does not allow users to import multiple PST files at one time. Users need to repeat process again and again.
• These manual methods can involve high risk of losing data.
• Original file structure & email formatting will not be maintained.
• Users need to follow multiple steps to convert PST files to Thunderbird which results in very time-consuming process especially when they have multiple PST files.
• All users cannot use these techniques as technical knowledge is required about Outlook & Thunderbird.

Expert Solution to Directly Import PST into Thunderbird

There are free techniques available to open PST in Thunderbird. If users don’t want to waste time on traditional technique then they can directly choose BitRecover Outlook PST Converter Tool. This application provides direct solution to move PST files in Thunderbird account without any technical setup.

PST to Thunderbird Converter Tool has simple intuitive interface that can be used by technical & non-technical users. It supports both ANSI & UNICODE format PST files without showing any complexity errors. This tool didn’t alter your data before & after import process. Users get same structure PST file in Thunderbird as they showed in MS Outlook.

Watch this Video to Import PST to Thunderbird

How to Open PST File in Thunderbird?

1. Firstly, download and install the tool on your computer.
   
2. Click on Select Files or Select Folders option to load the multiple PST files or folders.
   
3. After that, preview the selected files in the software panel. Simply check or uncheck them before proceeding.
   
4. Use the advanced filter options to import specific emails from PST to Thunderbird.
   
5. Thereafter, pick Thunderbird as a saving format from the list of file-saving options provided by the software.
   
6. The software automatically chooses the default destination path to save the resultant data.
   
7. After that, press on the Next tab to open PST files in Thunderbird.
   
8. Lastly, after completion, open your Thunderbird and see the imported data directly.

Features & Benefits of Professional Solution

• Maintain PST Hierarchy: Users can easily open PST files in Thunderbird. All PST items such as items that include attachments, subjects, & sender/receiver details, remain same after import process.
• Bulk PST Import Process: This tool helps users to import bulk of PST files. It saves users time & efforts that they waste in free method.
• No Outlook Required: Users don’t need to download Outlook on their computer to move PST files in Thunderbird. Just download software & start import process without any additional software requirements.
• Repair PST File: Users can choose corrupted & damaged Outlook PST file that they want to access in Mozilla Thunderbird. This application easily selects inaccessible PST file & help users to access them without any hassles.
• Direct Solution: Users don’t need to use “Thunderbird ImportExportTools NG” or Thunderbird “Import” tool to access PST file in Thunderbird. It directly selects your Thunderbird profile path and move PST file to your Thunderbird profile.
• Advance Filters: It helps users to filter PST files before import in Thunderbird by date range, email address, subject, & folders.

Time to Conclude,

In this blog, users get to know main requirements to import PST into Thunderbird. This article also explained simple & free method to import PST files into Thunderbird in bulk. First two methods are totally free didn’t require any license key to import PST files in Thunderbird but they are not suitable for all users. Whereas the third method is direct and perfect for users who want to save time and want a direct procedure to import PST emails to Thunderbird. So choose the method wisely that fits your requirements. I hope this blog helped you understand and fix your query.

About the Author

Rollins Duke

Technical Content Writer at BitRecover · 2129 articles

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