A Simple Guide to Convert EML to MBOX

Written By Shivam Rathore
Updated on March 25th, 2025

Summary: Do you know MBOX saves all the data in a single file rather than storing them individually? Isn’t it great to save storage space and also easily access the data? Definitely, it is. So, to gain these and other advantages of a different format compatible with multiple clients, convert EML to MBOX. To know how stay in this blog and explore free manual ways and a professional EML Converter Tool. But before that, see the essential benefits of this file format conversion.

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Convert EML Files to MBOX: Know Why?

The two file formats differ from one another both in terms of applications compatible with and their functionalities. Moving on, these are some of the main reasons for users to change EML to MBOX:

Streamlines the email backup and organization for long-term data archive.
Consolidation of multiple emails in a single file for smooth data management.
MBOX files offer more system storage as compared to EML files.
Easy and quick transfer of data to several email clients and desktop apps.
Compatible with all OS and devices to view, edit, and access data.

After learning the importance of EML to MBOX conversion, let’s go through the methods that help with an effortless conversion.

Convert EML to MBOX File: Know How?

We have understood that EMLs are email messages that store data in plain text files individually. Whereas, MBOX are the single files containing entire mailbox data. Also, a deep understanding of them is formed after browsing through the reasons. Now, let’s proceed to find a manual method and a professional tool to transfer EML data files to MBOX.

Manual Technique to Export EML Files into MBOX

This method is simple to use and directly converts EML to MBOX using the Thunderbird application by Mozilla. In this, first, you need to import EML into Thunderbird and later, convert them to MBOX. Follow these steps to convert EML to MBOX:

Run Mozilla Thunderbird and add your email account.
Then, right-click Local Folders and create a new one named EML Files.
Further, add the ImportExportTools NG add-on to the profile and restart it.
Move to the new folder, right-click it, and select ImportExportTools NG.
After that, press Import EML Messages -> Individual EML Messages.
Select the EML messages from the system and add them to your profile.
Afterward, right-click the EML Files folder and click ImportExportTools NG.
Then, press the Folder Export (MBOX) option and choose As MBOX File.
In the end, select the folder to save the new MBOX and click Select Folder.
Your EML files are converted to MBOX. View them at the specified location.

This free method is straightforward but contains some limitations. Like, the process takes a lot of time depending on the file size, and involves multiple steps. Another con is there are chances of data loss or application crashes while the process is running. Moreover, users must have technical knowledge to perform these steps correctly. Besides that, it is limited to desktop application users.

Ultimately, the method is not the most accurate solution, unlike a professional tool.

Advanced Tool to Convert EML to MBOX Files

To overcome the specified limitations of the manual method, use the expert EML Converter Tool. It converts EML files to MBOX format while retaining email metadata, folder structure, textual content, and attachments. It also helps to convert EML files to PST, MSG, and various file formats. This excellent utility is suitable for all users and requires no technical knowledge. Additionally, it runs smoothly on every Windows OS and provides customization features and filter options. Moreover, users can convert any number of EML files from any client at once without restrictions.

How to Convert EML Files to MBOX?

Follow these steps to conveniently save EML data in MBOX file format:

Install and run the best EML Converter utility on the system. Tap Next.
Select EML files and folders from the PC and click Open to add. Hit Next.
Further, view and select the folders from the preview panel and click Next.
Opt for MBOX format from the drop-down menu and choose filters.
At last, specify a Path to Save MBOX files, and finally, press Convert.

Conclusion

This blog describes the appropriate solutions to convert EML to MBOX with the reasons for doing so. The manual solution explained above is easy but has unavoidable limitations that make it less considerable. Hence, a professional tool is the ultimate solution for EML files to MBOX conversion in bulk securely and without hassle.

Frequently Asked Questions

Q: Can we perform selective migration in this tool?

Ans: Yes, you can easily perform selective migration in this EML Converter Tool. It has a feature named Date Range that enables you to select specific To and From dates. By doing so, the tool automatically performs conversion for that particular period only.

Q: How do I convert EML files to MBOX?

Ans: By following these steps, convert EML to MBOX:
1. Launch the EML Converter Tool and select the EML files or folders to add.
2. Open EML files, click Next to preview, and select for conversion. Hit Next.
3. Select the MBOX file format and pick optional filters and a location to save.
4. Finally, press the Convert button at the bottom to complete the process.

About The Author:

Shivam Rathore

Meet Shivam, an experienced SEO executive and content strategist. He combines creativity with strategy to craft engaging content that connects with audiences and supports brand goals. With strong expertise in digital marketing and content planning, Shivam helps businesses thrive online.