Top 02 Approaches to Import MBOX Files to Gmail on Windows

April 24, 2024

Summary: Do you want to import MBOX files to Gmail and are looking for a solution? Then this blog is for you. Here we will explore the two best and most reliable methods to transfer MBOX to Gmail. 

MBOX (Mailbox) is a plain text file that stores a complete collection of messages separated by special markers. It is compatible with various email clients including Thunderbird, Apple Mail, SeaMonkey, etc. MBOX files are majorly used for email backup, email migration, and archiving. On the other hand, Gmail is a cloud-based web email client. Its wide range of productivity and collaboration tools make it a widely opted email client by users. Moreover, it also offers various advanced features that make email management easy for users.

Due to the plain text nature of the MBOX files they become large and unwieldy, especially while containing a large number of email messages. Therefore, users want to import MBOX to Gmail account. Some other reasons are shared below. 

Reasons to Import MBOX Files to Gmail

  • Uploading MBOX files into an email client like Gmail ensures smooth access to data from anywhere and on any device.
  • While switching from Thunderbird to Gmail, users often want to transfer MBOX files to Gmail to backup their important data.
  • Gmail offers various collaboration and productivity tools for smooth teamwork and communication.
  • Its advanced spam filter and labels make the management of emails easier for the users.

Now that we have discussed some common reasons to import MBOX to Gmail, Let’s discuss the different techniques to perform this migration.

Manual Method to Import MBOX Files to Gmail Account

  • Open Gmail and Log in using the credentials.
  • Now, click the Settings option ( Gear Icon)  and navigate to the Account and Import option.
  • Then, go to the Import Mail and Contacts option and enter Thunderbird credentials in the pop-up.
  • Provide the Thunderbird credentials from which you want to export the MBOX files. Click Continue.
  • In the pop-up wizard, choose the emails you want to import and then click on the Start Import option.
  • Once the import process is done, click on the Finish button.

This method is an ideal way for users to transfer MBOX to Gmail who are still using Thunderbird. However, it has its own set of limitations. Let’s look at some of its drawbacks.

Restrictions of the Manual Method

  • To perform this migration process, users require adequate time and effort.
  • Users need to be technically sound.
  • It doesn’t provide an option to filter unnecessary emails. 
  • This method is not suitable for transferring large MBOX files.

Due to these restrictions, users do not align with this manual method. So, now you may think “How do I open an MBOX file in Gmail without Thunderbird?” In the next section, we will discuss an easy and quick solution to transfer MBOX to Gmail without Thunderbird.

How Do I Open an MBOX File in Gmail Without Thunderbird? Direct Method

One of the easiest and quickest solutions to import MBOX files to Gmail is by using the MigrateEmails MBOX Converter Tool. With the help of this software, users can migrate multiple MBOX files into a Gmail account. This tool maintains data integrity and folder originality during the entire migration process. Moreover, this tool also supports selective migration of emails as per the user’s requirement. Further, users can also convert MBOX files to PDF, PST, CSV, MBOX, EML, and other file formats.

Steps to Upload MBOX Files into Gmail

  • Run the MBOX Migrator Tool on your System as an Administrator.
  • Choose the Select Files/Folders option and add the required MBOX files.
  • Select the Mailbox items from the Preview option that you want to import to Gmail.
  • Now, click the Email Clients option and select Gmail from the drop-down list.
  • Enter the Gmail credentials in which you want to import MBOX files. Click Login.
  • Finally, click on the Convert button to initiate the process of importing MBOX files to Gmail.


In the above article, we have shared the best methods to import MBOX Files to Gmail. We have also discussed some common reasons why users often want to perform this migration process. In the manual method, users may face certain limitations. Therefore, we recommend going with the professional tool for a smooth and hassle-free migration of MBOX files into Gmail account.

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