How to Extract Thunderbird emails into EML Format?

Written by jaxonreed  »  Updated on: July 05th, 2025

How to Extract Thunderbird emails into EML Format?

Email is a key part of our professional life every day. Email is a very vital tool for talking to people, transferring data, and keeping sensitive information safe. When dealing with emails, you could hear the words "Thunderbird" and "EML files" a lot.

In this blog post, we'll talk about what these are, why someone would need to get data out of Thunderbird, and how to change Thunderbird emails to EML format, both manually and with a simple but reliable converter.

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What is Thunderbird?

Mozilla Thunderbird is an email client that is both open-source and free to use on your computer. It lets people keep track of their emails, contacts, calendars, and tasks all in one location. A lot of people use Thunderbird since it's simple to use and lets you connect to more than one email account, including Gmail, Yahoo, Outlook, and others.

MBOX is the file format that Thunderbird uses to store its email data. This format keeps all of a mailbox's messages in one big file, which makes it harder to get to or share specific messages.

What is a file with the EML extension?

Email Message File is what EML stands for. This is a file type that lets you preserve individual email messages. Each EML file contains the email text, sender and receiver information, date, topic, and attachments. You can open these files in a lot of other email programs, such as:

  • Microsoft Outlook
  • Mail for Windows
  • Mail from Apple
  • eM Client

So, changing Thunderbird emails to EML format makes it easy for anyone to open or distribute single messages.

Why do people change or export their emails?

There are a lot of reasons why users shift their emails from Thunderbird to a different platform or format:

  • Moving to a different email program, like Outlook
  • Sending individual emails to other people
  • Making copies of key messages
  • Getting back emails from past accounts

In all of these cases, extracting Thunderbird emails to EML format might be a useful and dependable fix.

How to extract Thunderbird emails into EML Format?

Now that we know the "why," let's speak about the "how." You can achieve this in two ways:

  • Manual Method
  • Using a software (simple and dependable)

Method 1: Drag and Drop

You can save Thunderbird emails as EML files easily, without any software.

  • Open the Thunderbird program on your PC.
  • Open the folder (like Inbox or Sent) and choose the emails you wish to send. To pick more than one email, hold down Ctrl (Windows) or Command (Mac).
  • Drop and Drag On your PC or desktop, open a folder. Now, drag the emails you choose from Thunderbird and place them into that folder. All done!
  • The emails that were dropped will now show up as .eml files in the location you choose.

Limitations of the Manual Method

  • You can't export whole folders at once, which is a limitation.
  • If you have a lot of emails, it takes a long time.
  • Doesn't support batch export or folder structure.

Using a reliable Thunderbird to EML Converter is the second way.

The WholeClear Thunderbird to EML Converter is an excellent solution if you have a lot of emails or want to save time. It helps you extract Thunderbird emails into EML format, retains organizational structures, and works rapidly with only a few clicks.

Main Features:

  • Changes Thunderbird MBOX files into EML files
  • Keeps the original layout and attachments
  • Allows you to convert several files at once
  • Simple to use—no need for technical expertise
  • Works with all versions of Windows

How to Use It:

  • Get the Tool and Install It
  • Go to the WholeClear website and get the Thunderbird to EML Converter.
  • Put it on your Windows computer.
  • Start the program.
  • Select Thunderbird default location
  • Add files to Thunderbird
  • To upload your Thunderbird MBOX files, click "Browse."
  • The utility finds Thunderbird profiles on its own, but you can also choose files yourself.
  • You can look at your emails in the tool before exporting them to make sure everything is proper.
  • Choose EML as the Format for Output
  • Select the folder where you want to save the modified EML files.
  • To start the procedure, click "Convert Now." Your Thunderbird emails will be stored as EML files on your PC in a few minutes.

Why Use Professional Software?

  • No risk of data loss
  • Keeps emails well-organized
  • Saves you hours of manual work
  • Great for personal and professional use

Final Thoughts

Exporting emails from Thunderbird to EML format doesn’t have to be difficult. The manual drag-and-drop method is enough if you require only a few emails. But for larger email folders or regular backups, using reliable software is faster, safer, and much easier.

No matter which method you choose, converting your emails to EML format gives you more flexibility to access, share, and back up your important data.



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