How to Export Thunderbird Emails to MHT?

Jenny Lowrence | May 7th, 2025 | Export Emails, Mozilla Thunderbird

Are you looking to export Thunderbird emails to MHT (MHTML) format? You’re in the right place! In this blog, we’ll guide you step by step on how to convert Thunderbird emails to MHT files in bulk. So, stick to this article till the end and get complete details.

Thunderbird is a popular open-source email client that many users rely on for managing their emails effectively. Whether you’re trying to save emails for offline access or share them in a single, easily accessible file, MHT (MHTML) format is a great choice. MHT is a web page archive format that combines HTML content along with all linked resources, such as images and styles, into a single file, making it easy to store and share.

Before we dive into the process, let’s understand why you might want to export your emails to MHT format.

Why Export Thunderbird Emails to MHT File Format?

  • Single File Storage: MHT combines the email content and all associated media into one file.
  • Offline Access: You can access your exported emails without an internet connection.
  • Easy Sharing: MHT files can be shared easily across different platforms and email clients.
  • Long-Term Storage: MHT files are ideal for archiving emails to ensure that all content is stored in one place.
  • Preserved Formatting: It ensures that your email’s original formatting stays intact.
  • Compact File Size: MHT files help reduce the overall size of separate HTML files.
  • Cross-Platform Compatibility: MHT files can be opened on different operating systems, like Windows and macOS, without compatibility issues.

If you’ve decided that MHT is the right format for your needs, let’s move on to the method to accomplish this task.

How to Convert Thunderbird Emails to MHT Files in Bulk?

Try the Advik Thunderbird Converter to quickly export emails from Thunderbird into MHT format. The tool auto-detects your configured Thunderbird profile and loads all emails for conversion without any manual steps. You can also pick specific folders from your Thunderbird mailbox that you want to export to MHT. The best part is that it keeps your original folder structure the same after conversion. It also offers smart filters, so you can export only selected emails based on date, subject, sender, recipient, and more.

So, what are you waiting for? Click the Free Download button and check its complete working process.

Steps to Export Thunderbird to MHTL Format

Step 1. Run the software and click Convert Configured Thunderbird mailbox data.

Convert Configured Thunderbird mailbox data

Step 2. Select the required mailbox folders to convert.

Select the required mailbox folders

Step 3. Choose MHT as a saving option from the list.

Choose MHT as a saving option

Step 4. Apply email filters to select specific emails. (Optional)

Apply email filters to export thunderbird emails to mht

Step 5. Browse the destination path and click Next to start the process.

click next to convert thundebird emails to mht

That’s it! The tool will begin exporting your selected Thunderbird emails into MHT format within a few moments.

Why Choose Automated Software?

  • No Manual Hassles: Avoid the time-consuming steps of copying and saving emails one by one.
  • Saves Time: Export thousands of emails in minutes with just a few clicks.
  • Maintains Email Structure: Keeps folder hierarchy, attachments, and original formatting safe.
  • Beginner-Friendly: Simple and easy interface — no technical skills required.
  • 30+ Saving Options: It can also export Thunderbird emails to MBOX, EML, PDF, HTML, etc.
  • Selective Export: Use filters to export only what you need, saving space and time.
  • Safe & Secure: No data loss or alteration during conversion.
  • Supports All Windows Versions: Works on Windows 11, 10, 8, 7, and older versions.

Final Words

We hope this blog helps you understand how to export Thunderbird emails to MHT format easily. If you have just a few emails, you might try saving them manually one at a time. But for large volumes or multiple folders, using a professional tool is the best choice. It’s faster, safer, and saves a lot of effort.

You can even try the free demo version of the tool, which allows you to convert a few emails and test all features. Once you’re satisfied, you can upgrade to the full version for unlimited conversions.