ThunderBird to Outlook Converter To Backup or Import Thunderbird files to PST, Gmail, Office 365 and many more

(Average Rating 4.7 based on 1536 Reviews on Trustpilot)

  • Instantly Convert Mozilla Thunderbird emails to MS Outlook effortlessly using straightforward steps.
  • Convert Thunderbird files to PST, EML, MSG, EMLX, PDF, HTML, and MHTML file formats for saving.
  • Import Thunderbird mailbox to Gmail, Yahoo Mail,, GoDaddy, Amazon Workmail, Office 365, and MS Exchange Server.
  • Enables the conversion of MBOX files from over 20 MBOX-based email clients.
  • Display Preview of Thunderbird emails prior to conversion process.
  • Preserves email integrity, formatting, hierarchy, and structure during the conversion.
  • Unrestricted Thunderbird conversion with no limitations on file size.
  • Supports all the latest versions of Microsoft Outlook.
  • Offers a free demo version.

Free Demo: Download trial version and migrate 30 items per folder free

3 Easy Steps to Export ThunderBird Mailbox to PST file


Backup ThunderBird Mailbox to PST and Other File Formats

Not only can you convert ThunderBird emails to PST but also to other file formats and cloud-based email clients.


Regain ThunderBird Mailbox Converter

All File Formats & Email Clients

File Formats- PST, MSG, EML, EMLX, PDF, HTML and MHTML Format

Email Clients- Office 365, Gmail, Yahoo Mail,, GoDaddy, Amazon Workmail and Live Exchange Server

Why Do Users Want to Convert Thunderbird to Outlook?

Here are some of the conditions during which this software stands tall.

To be A Part of Microsoft Suite

With Microsoft plans/services, the best part is that users get all applications/ services in a single plan, and with Microsoft’s technology, the same applies to Office 365 subscription plans. Users remain surrounded by Microsoft’s products/services, and all are well-versed in them.

Outlook is More Advanced

We all know technical developments always remain the backbone of Outlook. Microsoft regularly introduces new and advanced features and keeps its users updated with technological changes. Organizations are showing a significant tilt toward Outlook to get all present and upcoming facilities. Users can also create and access Outlook profiles for any account.

To Get Advantages of PST File

Outlook PST files offer more facilities than email data storage file format. PST file can be added to any Outlook account and accessed. They are easy to port and secure; users can encrypt PST with the password.

Technical Specification

Check out the Specifications of Regain ThunderBird to Outlook Converter before installing.

ThunderBird to Outlook Converter Tool

System Requirements

  • Processor - Pentium Class
  • Memory - Minimum 128MB RAM (512MB recommended)
  • Hard Disk - 50 MB for Software installation
  • Disk Space - Enough space to store recovered output

Version Supports

  • Windows OS Platforms - Windows 11/10/8.1/8/7/Vista
  • Windows Server - 2012/ 2008 R2/ 2008/ 2003 R2/ 2003
  • MS Outlook - 2021/ 2019/ 2016/ 2013/ 2010/ 2007 and 2003

Installation / Uninstallation

Installation / Uninstallation EULA

Prominent Features of ThunderBird Mailbox Converter Tool

You must check all the exclusive features of this software before you make the final purchase.

Flawless Thunderbird to MS Outlook Conversion

Effectively convert Mozilla Thunderbird files to Outlook PST files with precise data preservation using Regain Thunderbird to Outlook Converter software. This professional tool excels at migrating Mozilla Thunderbird profiles, local folders, and mailboxes to the PST format, making it the optimal choice for seamless transitions.

Thunderbird to Office 365 Migration

Empower users to effortlessly transfer Thunderbird files to Office 365 with Regain Thunderbird to Outlook Converter. This software streamlines the migration process, ensuring seamless relocation of all MBOX files to Office 365 environment, providing a hassle-free transition for users.

Thunderbird Mailbox to Cloud Server

Facilitate the export of Mozilla Thunderbird mailbox to various Cloud Servers, including Mozilla Thunderbird to Gmail, Yahoo Mail,, GoDaddy, Amazon Workmail, Office 365, and MS Exchange Server using the software. This versatile tool simplifies the process, enabling seamless migration of MBOX files to these cloud-based platforms.

Multiple MBOX Files Conversion

Empower users to effortlessly pick and convert numerous Thunderbird folders to PST files using Regain Thunderbird to Outlook Converter. This feature streamlines the process, enabling the conversion of multiple MBOX files in one go, ultimately saving time and effort for a more efficient experience.

Maintains Integrity of Thunderbird Mailboxes

Regain Thunderbird to Outlook Converter preserves the original folder structure, email formatting, integrity, hierarchy, and structure while migrating. The software retains crucial email attributes, including To, From, CC, BCC, Sent/Receive Date, and Time, ensuring a seamless transition.

Save MBOX File in Multiple Format

This tool empowers users to save converted MBOX files in versatile formats such as MBOX to EML, PST, MSG, EMLX, PDF, HTML, and MHTML. This flexibility ensures that users can choose the most suitable format for their specific needs after completing the conversion process, enhancing convenience and utility.

Advanced Search Feature

Regain Thunderbird to PST Converter software streamlines the process with its advanced search function, allowing users to locate MBOX files on their system. The software scans and presents the identified files for review before initiating the conversion, enhancing user control and efficiency.

Displays Preview of Thunderbird Emails

Before converting to the Outlook PST format, the software displays all scanned emails for users to visually inspect the content. This allows users to ensure that the conversion accurately represents their email data, providing peace of mind and quality assurance.

Available as Free Demo Version

Experience its features and functionalities with the free downloadable trial version. Users can explore the software's capabilities at no cost, with the only restriction being a limit of 30 items per folder. To enjoy unrestricted email item saving per folder, acquire the full licensed version.

Have A Look at a Real-Time Case of Thunderbird to PST Conversion

Check the real-time case that one of our clients has faced with the Thunderbird email client.

Case For a long time, our organization has used Thunderbird to manage our application, as it allows the addition of any email account. Now, we are entirely shifting to Microsoft’s single subscription plan for all services; hence, we want all our email data in Outlook. How can we do this without altering any originality?

Solution Converting Thunderbird to Outlook is straightforward if you have a Regain Thunderbird to Outlook Converter. We know that Thunderbird creates MBOX files to save data, and Outlook allows you to add PST files and access them. Simply use this Regain MBOX to PST Converter and get all your emails in Outlook. This tool properly maintains the original folder structure and meta-properties; hence, there is no need to worry about alteration.


Check the review section and see what top software companies and some of our clients have to say about our software.

Software Reviews


CNET We tested this Regain Thunderbird to PST Converter utility on various parameters, and it topped the 'user-centric features' category. The best thing is its facility to manage the resultant PST file size while converting a large MBOX to PST. View Details →


Software Suggest Handling large MBOX files and converting them to PST with a maintained folder hierarchy makes it one of the most reliable utilities. It preserves each meta-property; hence, it is recommended for professional handling. View Details →

Client Reviews

Compare the Free and Full Version of ThunderBird Mailbox Converter Tool

Check the features of the free and paid version of this software for better understanding.

Software Features Trial Version Full Version
Instantly Export Thunderbird Files to MS Outlook
Support Approx. 20+ Email Clients
Convert Thunderbird Files to PST, MSG, EML, EMLX, PDF, HTML and MHTML Format
Import Thunderbird mailbox to Gmail, Yahoo Mail,, GoDaddy, Amazon Workmail, Office 365 and MS Exchange Server
Display Preview of emails before conversion
Maintain all email properties and folder hierarchy
Support all latest MS Outlook versions
Free Technical Support
Saving Capabilities Save 30 items/Folder Unlimited
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Have a look at the questions asked by our clients and how we have cleared all their doubts

Following are the steps to convert Thunderbird emails to PST file:-

  • Download and Run Regain Thunderbird to Outlook Converter Software
  • Browse and select Thunderbird MBOX files for conversion.
  • The software displays a preview of all mailbox items.
  • Select the destination location and target format as PST, and click Export to initiate the conversion process.
  • Click Save Now to save the files.

Yes, Regain Thunderbird to PST Converter tool that supports moving, transferring, exporting, migrating, and converting Thunderbird SBD folder data to MS Outlook.

Yes, breaking the data file of resultant Thunderbird files is possible. The tool provides a Split option where you can customize the size while exporting Thunderbird email folders without any hassle.

Regain Thunderbird Mailbox Converter is a dedicated tool created to facilitate the transfer of email data from Thunderbird to MS Outlook. It enables the conversion of Thunderbird mailbox items such as emails, contacts, calendars, and attachments into Outlook PST format.

Regain Software makes it easy to transfer your email data from Thunderbird to Outlook, facilitating a smooth transition between email clients while preserving the integrity and accessibility of your data in Outlook.

Our tool enables you to migrate multiple Thunderbird mailboxes in one go, saving you a lot of time and effort.

Yes, Regain Thunderbird to Outlook Converter guarantees the retention of all email attachments. This ensures that there is no loss of data when migrating.

Regain Thunderbird to Outlook Converter ensures that the folder structure of your Thunderbird mailbox is maintained in the resulting PST file. The software maintain your data as it is as it was before.

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