-
Written By Divyanshu Sharma
-
Updated on December 23rd, 2025
OST files are created by MS Outlook with the intention to store mailbox data on a local system. However, these files cannot be opened in most other email programs. Because of this, many users look for a way to convert OST files into EML format, which is supported by popular email clients like Thunderbird, Windows Mail, and others.
Summary: In this blog, we will explain the main reasons for converting OST to EML and share both manual ways and a professional OST to PST Converter Tool to complete the task. The methods discussed help users move their emails safely while keeping attachments and folder structure intact. Read further to understand the conversion process in a clear and easy way.
This is a manual and free method to convert OST emails to EML format using Outlook and Thunderbird. It works best when you have a small number of emails to convert. If you want accurate results from this OST to EML conversion, follow each step carefully.
Now, move the required emails or folders by dragging them from your OST mailbox and dropping them into the connected Gmail folder.
Thunderbird will save the selected emails in EML format at the chosen location.
The OST to EML Converter is a reliable option for converting Outlook OST files into EML format. It works with OST files created in all Outlook versions, including both old and latest editions. During the conversion, the tool keeps email details like sender, receiver, subject, attachments, and formatting intact.
The software is easy to use, so even users without technical knowledge can operate it without trouble. Along with EML conversion, it also allows users to import OST data into Office 365, Gmail, and other email clients. The tool runs smoothly on all Windows and macOS versions, making it a flexible solution for different systems.





Now you have a clear idea of how OST files can be converted into EML format. We covered multiple methods for this conversion. Although manual methods are available, they take more time and can be confusing, especially for new users. Because of this, using a trusted OST to EML converter tool is a better choice. It makes the process easier and helps convert Outlook emails safely without needing any technical knowledge.
Ans: In most manual cases, Outlook is required because OST files are linked to an Outlook profile. However, with a professional OST to EML Converter Tool, you can convert OST files to EML without needing Outlook installed or configured.
Ans: Yes, attachments are preserved during OST to EML conversion when using a reliable converter tool. Manual methods may sometimes miss attachments, but a professional solution ensures emails and attachments remain intact.
Ans: Manual methods cannot convert corrupted or inaccessible OST files. To safely convert a damaged OST file to EML, use a professional OST Converter Tool that recovers and exports emails without data loss.
About The Author:
I, Divyanshu Sharma, am a Technical Content Writer with a solid foundation in software and IT. I specialize in data management, email migration, and data recovery solutions, turning complex processes into clear, practical guides. With expertise in SEO, digital marketing, and content strategy, I create user-friendly, highly discoverable documentation that delivers technical accuracy and real-world value for IT admins, decision-makers, learners, and everyday users.
Related Post
Useful Links
Important Links
© Copyrights 2014-2026 EasyTechTools is an affiliate partner of SysInfoTools - All Rights Reserved