How to Import OST File to Thunderbird in 2025

[Rajsingh]

To Import OST file to Thunderbird, you need to convert it to a format supported by Thunderbird, such as MBOX or EML. Unfortunately, OST files cannot be directly imported because they are linked to specific Exchange profiles. The manual process involves converting OST to PST using Microsoft Outlook, then using an external utility to convert the PST file to MBOX or EML for Thunderbird. This method requires Outlook and can be time-consuming, especially for users with large or corrupted OST files. Challenges include potential data loss, file corruption risks, and the need for technical expertise to handle the conversion.

To simplify this process, the Cigati OST to PST Converter Tool provides an efficient solution. This tool directly converts OST files into PST, MBOX, EML, or other Thunderbird-compatible formats without needing Outlook. It preserves email properties and folder hierarchy, ensuring no data loss. Additionally, it supports batch conversion, encrypted OST files, and allows selective conversion of emails. The tool’s user-friendly interface ensures even non-technical users can easily manage the migration process. Using Cigati OST to PST Converter eliminates manual complexities, saving time and ensuring accurate results. This makes it a reliable choice for migrating OST files to Thunderbird smoothly.
If you want to import the Contacts and Calendars only, instead of the entire mailbox. Then, firstly, create a CSV file and import it into Thunderbird.

[angelica324]

Users can effortlessly import OST files to Thunderbird using the best OST to PST Converter. This tool offers an ideal solution for those who want to back up their OST files. It has advanced features allowing users to create backups based on their specific needs. With a date filter, users can select OST files to back up within a chosen date range. Additionally, the OST to PST Converter supports bulk migration of OST files, ensuring the original data structure remains intact.

[treekmostly]

In 2025, converting an OST file into a format like PST before importing it into Thunderbird will be essential, since Thunderbird does not support OST files directly. With the help of WebbyAcad OST Converter Tool, all such complexity is eliminated as it allows you to convert OST files directly into formats that can be imported into Thunderbird. Multiple conversions are possible with the assurance of retaining all email attributes, hence allowing you to achieve a seamless transfer of data. So if you want a hassle-free solution for converting OST to Thunderbird, go along with the WebbyAcad OST Converter Tool.

[james123]

Are you wondering how to import OST Files to Thunderbird in 2025? Here I share the most reliable tool that is Mailvita Converter for OST for Windows it enables to migration of multiple OST files into Thunderbird with all attachments. During the conversion, it does not change the original structure and it also provides a preview. It supports all Windows OS. This application also converts OST files into multiple file formats Like PST, EML, MSG, etc. Its graphical interface is user-friendly and simple to understand, it lets the user export OST files into Thunderbird format with a few clicks. It provides a free demo version.

[deepti]

Need to convert OST files to Thunderbird? The BLR OST to PST Converter Tool is the perfect solution! This efficient tool simplifies the process by converting OST files to MBOX format, which is fully compatible with Thunderbird. Whether you’re dealing with orphaned, encrypted, or large OST files, this tool ensures a hassle-free and accurate migration. It maintains the original folder structure and preserves all emails, attachments, and metadata during the conversion. With its user-friendly interface and fast processing, even non-technical users can perform the conversion effortlessly. Get BLR OST to PST Converter Tool today for seamless OST to Thunderbird migration!

[mariahirthe]

Try the best and amazing CubexSoft OST to MBOX Converter software to convert unlimited Outlook OST files to Thunderbird MBOX format and multiple other file formats such as PDF, MBOX, EML, MSG, DOC, RTF, TXT, OLM, office 365, Gmail, and many more. It is a very simple and easy-to-use application. This software offers various advanced features to quickly open Outlook OST files in multiple formats. It keeps all the folder structures without any changes or data loss.  It was compatible with both Mac OS and Windows OS including Windows 11. Try the free demo version of the software without any cost.

[philbarden]

If you're in search of a reliable solution to convert OST files to PST format, Kernel for OST to PST Converter is the ideal choice. Known for its exceptional accuracy and performance, this professional tool is trusted and recommended by experts worldwide. It enables seamless conversion of large OST file batches to PST with ease, eliminating any complexities. Additionally, the tool offers an efficient duplicate email removal feature, ensuring a cleaner and more compact output for a smoother experience.