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A Complete Guide to Open Large MBOX File from Various Sources?

Published By Jamie Kaler 
Rollins Duke
Approved By Rollins Duke
Published On October 5th, 2023
Reading Time 6 Min Read


Overview: Are you seeking for a solution to open large-sized MBOX files? If Yes, then go no further as in this blog, we will learn how to open large MBOX files in detail. So, stay tuned.

MBOX files are created by many email clients and sources. Sometimes, MBOX files are of small size. There are many applications or solutions available to open MBOX files in multiple formats. But, what if the size of your MBOX size is very large? Not to worry! Finally, we have found a solution to open large MBOX files quickly and with ease.

Here, in this article, we have mentioned a very simple and direct solution to open MBOX files in various formats. To open MBOX files, you can convert them to some other file format like EML, PDF, PST, etc.

You can also migrate your MBOX file to some other email services or webmail accounts such as Gmail, Yahoo Mail, Office 365, Outlook.com, etc. There are lots of users who want to know how to open large-sized MBOX files on different platforms.

Hi, I have a large MBOX file exported from my old computer. I want to open this MBOX file in my Outlook email client application. Does anyone know how to import Large MBOX files to Outlook 2016? Also, I want to import MBOX files into my Gmail account. So, I’m looking for a multiple-option solution. Please Help!

Use an Professional Solution to Open Large MBOX Files

The RecoveryTools MBOX Migrator Wizard is a multi-featured solution that gives many file-saving options. Also, it is one of the fastest solutions to open large MBOX files such as Gmail MBOX files, Thunderbird MBOX files, or any other MBOX file in a few minutes. Before knowing more about the solution, let us know the steps to open large MBOX files quickly. You can easily download this application on your Windows as well as Mac computers.

Download from Here:

Note: You can use this application to export a few emails from MBOX files. For complete data conversion, you need to purchase the software key.

Steps to Open Large-Sized MBOX Files

  1. Launch the software on your computer.
  2. Select MBOX files with dual selection options.
  3. Choose the required file-saving option in the list.
  4. Set destination location path to save converted data.
  5. Click the Next button to open the large MBOX file easily.

How to Open Large MBOX File? – Complete Steps

Follow the steps given below to browse large MBOX files:

  • Firstly, download and install the utility to open MBOX emails. Secondly, run the tool and add the required MBOX files from the Select Files or Select Folders option.


  • Choose required mailbox files/folders to open. Click the Next button.


  • Select PDF from the Select Saving Option drop-down list.


  • Choose Destination Path and File Naming Option. Click the Convert button.


  • The conversion process starts as you can view on your screen.


In this way, the utility will convert your MBOX file into the PDF format. After the conversion, you can easily open the large MBOX file in the PDF format. You just have to open your PDF file using Adobe Reader or any other application.

Note: The software to open large MBOX file is one of the fastest solutions available in the market. It can convert up to 1 GB MBOX file in 5 to 8 minutes.

Quick & Easy Way to Open Large Gmail MBOX File

The utility mentioned in the above steps is a professional approach to open large MBOX files in multiple formats. It has an interactive and self-explanatory user interface. Also, there is an option to select multiple files for batch migration. With this software, you just need to add the MBOX file of any size, choose the file saving option and do the required conversion.

This utility also gives an option to save converted messages in the same source folder for many file formats. It automatically chooses all the added files/folders. You can uncheck the folders that are not required.

Download from Here:

Advanced Features to Browse Large Thunderbird MBOX Files

  • Support MBOX Files from Multiple Sources:

The utility supports all types of MBOX files, such as Gmail MBOX, Thunderbird MBOX, Opera Mail, Eudora Mail, Spicebird, The Bat, and Entourage.

  • Fastest Solution:

This software is the fastest solution to open large MBOX emails. It does all the conversions in just a few moments. There is no limitation for the size of MBOX emails that you want to open.

  • Windows OS Support:

This product is supported by all versions of the Windows Operating System. So, it can be installed on all older and latest versions of Windows such as Windows 10, 7, Windows XP, and Windows Vista.

  • Free Demo Version:

Also, there is a free demo edition available for the utility. It is the limited edition of the Migration License of the software.

  • Open MBOX File in Multiple Formats:

A number of File Saving Options are available in this utility. You can choose any of them and open MBOX large mailbox in the required format or email client.

  • Maintains Folder Hierarchy:

This solution does all the required conversions without losing any data. It maintains proper hierarchy of all MBOX folders.

  • Open Large MBOX with Attachments:

Moreover, all the attachments are also converted with this tool. For example, if you open your MBOX file in the PDF format with this utility, you will find your MBOX file attachments in the embedded form there.

  • Destination Path & File Naming Options:

The utility to open large MBOX file allows you to select the Destination Path for saving output files. Also, it gives around 10 different file naming options. These options are various combinations of Subject, Date, From, etc.

Observational Verdict

In the above blog, we have discussed a direct approach to open large MBOX file in various formats with ease. So, if you want to read your large MBOX file, you can go with this solution. A free trial version is also available for the software. You can use it to understand the tool better and contact to our technical support team for more information.