How to Convert Thunderbird MBOX to Maildir With Attachment?

Jackson Strong | October 8th, 2022 | Email Migration

“How do I convert MBOX to Maildir in Thunderbird? I am using Mozilla Thunderbird 78.0 version in my Windows 11. I want to migrate Thunderbird MBOX to Maildir file format. Unfortunetly, there is no option available. How should i do it?”

– User from Mozilla Forum

“I want to export Thunderbird folder to Maildir. Wether I have to install any plugin, or there is an better option for that. Please share me the suitable way. ”

– Ryan Gosling

Searching for MBOX to Maildir conversion solution? Don’t worry, today I will be discussing the simplified way to convert .mbox file into Maildir.

Need for MBOX to Maildir Conversion

There are various users who want to transfer MBOX emails to Maildir. The situation may vary. Maildir is a common way of storing messages in which each message is stored in a separate file with a unique name, and each mail folder is a file system directory

MBOX file-supported clients are Thunderbird, Google Takeout, Eudora Mail, Opera Mail, etc. There is no direct option to export emails from these email clients to Maildir. So you’ll require a third-party solution.

How to Convert MBOX to Maildir in 4 Steps

Download and Install the Advik MBOX Converter tool on your Windows PC. This tool is specially designed to export MBOX emails to various popular file formats. This smart utility is widely used to convert MBOX to PST, CSV, EML, MSG, TGZ, XPS, RTF, and many more.

Make use of this handy utility to change MBOX to Maildir directly with complete information. Additionally, you can even repair corrupt MBOX files and convert them afterward without any data loss.

Steps for Thunderbird MBOX to Maildir Conversion are as follows;

  1. Run the MBOX to Maildir Converter on your Windows PC.mbox to maildir
  2. Click Add File and locate the .mbox file into the thunderbird mbox file
  3. Choose Maildir as a saving option from the maildir option
  4. Select the output target location to save the resultant file.chosee destination path to convert mbox to maildir
  5. Click the Convert button to start the conversion process.
    click convert for mbox to maildir conversion

Finished! The software will instantly start migrating .mbox to Maildir format.

Watch Video Tutorial

In-built Features of MBOX to Maildir Conversion Tool

This automated tool is designed with advanced and user-friendly features to effortlessly handle the conversion of multiple MBOX files to Maildir. Here’s a quick overview:

  • User-Friendly Interface: The tool is programmed with a user-friendly interface to favor both technical and non-technical users.
  • Batch Conversion: It allows the conversion of multiple files or folders of MBOX to maildir simultaneously.
  • Preserve Key Elements: The tool supports converting files while retaining attachments and other properties.
  • Import MBOX to Webmail Account: With this tool, users can also upload MBOX file to Office 365, Gmail, Yahoo, etc.
  • Repair MBOX File: This tool works efficiently to repair MBOX file and Recover emails safely with a few simple clicks.
  • Dual Loading Options: Users can load MBOX files using either the ‘Select Files’ or ‘Select Folders’ options.
  • Data Accuracy: The tool ensures complete data accuracy, preserving email file structure. Multiple file naming options are available to help organize converted MBOX files efficiently.
  • Retention of Email Attributes: It retains all email file attributes, including Message Header, Signature, Hyperlinks, Images, etc.
  • Windows OS Compatibility: The tool supports conversion of MBOX to Maildir on various Windows OS versions, including Windows 11, Windows 10, Windows 8, Windows 7, Windows XP, Windows Vista, and many more.


Download the FREE tool and convert MBOX to Maildir format with ease. The software is completely standalone, you can execute the conversion process with Thunderbird, Eudora Mail, Opera Mail, or any supportive email client. MBOX to Maildir Converter is easily compatible with Windows 11/10 and earlier versions.