Outlook PST to MBOX Converter

A Tool to Convert Outlook PST Files to MBOX Format smoothly

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Migrate PST file to Mbox

Migrate PST mails to MBOX Format

The Outlook to MBOX Converter allows exporting emails from Outlook to Thunderbird file format. It can convert the entire folder of PST to MBOX having email folders like Inbox, Sent Items, Drafts, etc. Only one PST file can be converted at a time and a single MBOX file is created for the same.

Outllok to thunderbird

Display Complete Data Count Details

This Outlook to MBOX Converter allows users to see the complete data count details. When a user loads the PST file and click on the Export button, then this tool will display the complete data count for each folder. It will show the name of a current folder, its folder count and the number of emails.

Export selective items

Maintain Folder Hierarchy During Migration

This converter provides an option to the user to keep the folder hierarchy intact when migrate PST to MBOX occurs. If a user wants to keep the hierarchy maintained, then select "Yes" option and if they do not want to maintain the folder structure then they can opt for "No" option.

PST to MSG Converter Navigation

How to Convert PST Files to MBOX Format

All Programs >> Outlook to MBOX Converter. Then, a ‘Check for Prerequisite’ window will appear.

Launch the Software

To initiate the Microsoft Outlook to Thunderbird migration, Click Open.

Add PST File

Click on Browse button and select the path of the PST file that needs to be converted.

Browse PST File

Browse PST File

After that, click on the second Browse button and select a destination path to import PST into Thunderbird MBOX or any other MBOX application.

Click Add File

Browse PST File

Now, choose Yes if you want to maintain the folder hierarchy or else select No and click on the Export button to start the conversion process.

Scanning Completed

Next, as the PST to Thunderbird process begins, you will see the Count Details of the PST files having current folder name, folder count, & email count.

Different Mail Previews

As PST mail to MBOX Thunderbird gets completed, you will get a prompt message regarding its completion including the path of the transfer PST to MBOX file. Then, click on OK button.

Export PST File

Finally, navigate to the location where you can find the converted MBOX file.

Convert PST emails

Watch Complete Video to Extract PST Files to MBOX

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  • First, run the Outlook to MBOX Converter tool.
  • After that, select Microsoft Outlook PST File.
  • Now, select the option to maintain hierarchy.
  • Finally, export Outlook mail to MBOX.
No, the tool to convert PST into MBOX does not impose any file size limitation. A user can export any number of files or any size of the file using this application.
No, there is no any requirement to have any MBOX supportive email clients such as Thunderbird, Eudora, Entourage or Poco Mail on the system.
The time required to migrate PST files to MBOX file format depends on the size of the Outlook PST file you want to convert.
The Outlook Email to MBOX can be done on Outlook versions 2016, 2013, 2010 and 2007.


“Being a common Microsoft Outlook user, I was not concerned about the corruption issues. But, when suddenly my account got crashed, then I had to find a way to back up my emails to another email client. I have used this tool to convert Outlook Email to Thunderbird and finished the entire conversion process within no time and that to be accurately. Really, I want to say a big thank you to the developing team for creating the best PST to Thunderbird Converter.”

-Steve Palmer, Germany

“It was always a difficult task to work with software but recently, I came to know about this tool to import PST into MBOX. I am highly impressed with the Outlook to MBOX Converter software. I must say this product has resolved my biggest query in easy and error-free manner. Thank you so much, developers!!”

- John William, USA