100% Private & Secure

Free MBOX Converter
Convert to Any Format

Convert MBOX, MBX, and MBS files to EML, EMLX, MSG, PST, PDF, CSV, HTML, TXT, or JSON. Supports Thunderbird, Gmail Takeout, Yahoo, Apple Mail, and more.

9 output formatsBatch file supportThunderbird & Gmail compatibleInstant conversion

Drop MBOX files here

or click to browse · select multiple files

Overview

What Is MBOX to PST Conversion?

MBOX to PST conversion turns an MBOX mailbox file (used by Thunderbird, Apple Mail, and Google Takeout) into a single Outlook PST file. PST is Microsoft Outlook's native format — one file that holds folders, messages, and attachments. After conversion, you open the .pst in Outlook to view and manage all your mail in one place.

Our free MBOX to PST converter processes on your device. You drop an .mbox file, and the tool parses it (splitting on the standard "From " separator), then builds a PST structure and lets you download one .pst file. All processing happens on your device; nothing is uploaded. This is ideal when migrating from Thunderbird or Gmail to Outlook.

PST format is designed for Outlook: it preserves folder structure where possible and keeps messages and attachments intact. Use cases include moving from Thunderbird to Outlook, consolidating Gmail Takeout into Outlook, and creating a backup of an MBOX archive in a format Outlook can open directly.

Features

Features

Why use our MBOX to PST converter

Single PST output

Your entire MBOX is converted into one Outlook PST file, ready to open in Microsoft Outlook.

Migrate to Outlook

Move mail from Thunderbird, Apple Mail, or Gmail Takeout into Outlook without desktop software.

No upload

MBOX is parsed and converted on your device. Your emails never leave your device.

Private & secure

Processing is done privately. No data sharing — safe for work and personal mail.

PST format explained

PST is Outlook's native mailbox format. One file holds folders, messages, and attachments for easy import.

Thunderbird & Gmail

Works with MBOX from Mozilla Thunderbird, Apple Mail, and Google Takeout exports.

How it works

How to Convert MBOX to PST

Four steps — no install, no sign-up

01
01

Open the MBOX to PST Converter

This page opens with PST already selected as the output format.

02
02

Drop your .mbox file

Drag and drop an MBOX file (e.g. from Thunderbird or Gmail Takeout), or click to browse.

03
03

Review the preview

Check the email count and preview. All messages will be combined into one PST file.

04
04

Convert & download PST

Click Convert & Download. Save the .pst file and open it in Microsoft Outlook.

Use Cases

Use Cases

When to convert MBOX to PST

Thunderbird to Outlook

Switch from Thunderbird to Outlook by converting your MBOX mailboxes to PST and opening them in Outlook.

Gmail Takeout to Outlook

Export Gmail as MBOX via Takeout, convert to PST, and import into Outlook for a full local archive.

Unified Outlook archive

Combine multiple MBOX exports into one or more PST files for backup or compliance in Outlook.

FAQ

Frequently Asked Questions

Common questions about MBOX to PST conversion

Q1. What is MBOX to PST conversion?
MBOX stores many emails in one file (used by Thunderbird, Apple Mail, Gmail Takeout). PST is Microsoft Outlook's mailbox format. Converting MBOX to PST produces one .pst file you can open in Outlook to view and manage all messages.
Q2. Why migrate MBOX to Outlook (PST)?
If you're switching to Microsoft Outlook for work or prefer its features, you need your old mail in PST format. Converting MBOX to PST lets you import everything into Outlook without re-downloading or manual forwarding.
Q3. How does the PST format work?
PST (Personal Storage Table) is a single file that stores folders, emails, and attachments in Outlook's structure. Opening a PST in Outlook shows it as a separate mailbox or set of folders you can browse and search.
Q4. Do you upload my MBOX file?
No. Conversion runs entirely on your device. Your file is read, parsed, and converted on your device. Nothing is sent to our servers.
Q5. Can I convert Gmail Takeout MBOX to PST?
Yes. Export Gmail via Google Takeout as MBOX, then use this tool to convert to PST and open the result in Outlook.
Q6. Does it work with Thunderbird MBOX?
Yes. MBOX from Mozilla Thunderbird, Apple Mail, and other sources that use the standard MBOX format are supported.
Q7. Is the MBOX to PST converter free?
Yes. The tool is free to use with no sign-up. File size is limited only by what your device can handle in memory.
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