MBOX PST
File conversion

Convert MBOX to PST

QUICK ANSWER
Is it possible to convert MBOX to PST?
Yes - MBOX converts to PST.

The free route imports the .mbox into Mozilla Thunderbird and then lets Outlook pull messages from the same account; dedicated MBOX-to-PST tools do it in one step but are typically paid or trial-limited. Large Gmail exports can take significant time.

4 programs
Also to PST: OST · SBD · NSF

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert MBOX to PST?

MBOX is the standard export format for Gmail (Google Takeout), Thunderbird, and Apple Mail, while PST is Microsoft Outlook's proprietary mailbox format. Switching to Outlook or archiving for an organization that requires PST makes this conversion necessary, since Outlook has no built-in MBOX import.

How to convert MBOX to PST

Aid4Mail MBOX Converter APP

Open your .mbox file in Aid4Mail and choose PST as the output format; the tool converts in one step and produces a .pst you can open directly in Outlook.

MBOX to PST Converter APP

Load the .mbox file, select PST as the target format, and run the conversion to get a .pst file ready for Outlook.

MBOX to PST Converter Tool APP

Import the .mbox, choose PST output, and export; open the resulting .pst in Outlook via File > Open & Export > Open Outlook Data File.

Programs that convert MBOX

Aid4Mail MBOX Converter
MBOX to PST Converter
MBOX to PST Converter Tool
Microsoft Outlook for Mac

About these formats

Quality & what to watch

  • Outlook cannot read .mbox files at all - conversion is mandatory, not optional.
  • Many advertised free tools are trials that cap the number of messages exported; verify the limit before relying on a tool for a large mailbox.
  • A Gmail Takeout .mbox can be several gigabytes and contain tens of thousands of messages; allow extra time for large exports.

Frequently asked questions

Is there a free way to convert MBOX to PST?
The free route uses Mozilla Thunderbird (import the .mbox with the ImportExportTools NG add-on), then Outlook's import wizard to pull messages from the same account into a .pst.
Can I open a PST on Mac?
Microsoft Outlook for Mac can open .pst files in recent versions, though the Mac-native archive format is .olm.
What is the difference between MBOX and PST?
MBOX is a plain-text container that concatenates email messages (RFC 4155); PST is a proprietary Microsoft binary database holding a complete Outlook mailbox including contacts, calendar, and tasks.
Will contacts and calendar data convert from MBOX to PST?
No - MBOX stores only email messages; contacts and calendar items have their own export formats and will not appear in the resulting PST.