Many users, having multiple email clients, like Thunderbird, Eudora, Apple Mail, or PocoMail, etc., face a challenge at some point or another – opening these mailboxes in Windows Outlook. This is because the above email clients save a copy of the mailbox data on our systems as an MBOX file. This is a container file format that is incompatible with Outlook on Windows.
While you can open an MBOX file via a text editor or using an MBOX-compatible email client (Thunderbird), these are only workarounds that help you open an MBOX file. If used for saving emails, they result in a missing folder structure.
There is, however, a way to keep the mailbox folder structure intact – by converting the MBOX file to PST format using an online MBOX to PST converter tool. Read further as you’ll find a step-by-step procedure to safely convert your mailbox file to Outlook-importable PST format, online at no cost.
How to Convert MBOX to PST without Losing Mailbox Folder Structure?
If you are looking for a way to convert your MBOX to Outlook-importable PST format, without losing the mailbox structure, then Stellar’s free online MBOX to PST converter tool is the one to go for.
It is a simple, fast, and straightforward utility that converts MBOX to PST without losing the folder structure. It effortlessly converts an MBOX file of size ≤ 100 MB for free. It is convenient to use as it works via a web browser on any device running Windows, macOS, or Linux. All it needs is an active internet connection.
If you want to convert a few large MBOX files, you can upgrade this utility to the Premium version. It converts 5 MBOX files, having sizes less than or equal to 5 GB, to PST without any hassle.
This web-based tool is also safe to use, as the converted file is available for download for 3 hours with the Free edition and for 24 hours with the Premium edition. After the time limit, the files are automatically deleted from the servers forever.
Here are some features of this free tool:
- Converts a single MBOX file (size ≤ 100 MB) for free
- Quickly convert an MBOX archive in 3 simple steps: Upload > Convert > Download
- Convert MBOX to PST without losing the mailbox folder structure
- No download/installation required for mailbox conversion
- Works without Outlook installed/configured on the system
- Can easily be used on any system (Windows, Mac, Linux)
Now, let’s see how to convert MBOX to PST online for free using this tool:
- Launch a web browser on your Windows/Mac/Linux PC and go to the website of the free online MBOX to PST converter tool.
- Click on Sign In at the top right corner.
- A window will appear. Click Sign Up at the bottom and enter your credentials. Again, click on Sign up.

- After logging in, click on the Upload MBOX File button.

- The Open window will appear. Use it to locate and select the MBOX file on your system. Click on Open.
- Once the file is uploaded, you will see the status updated to File Uploaded. Click on Start Conversion.

- After the conversion to PST format, the File Converted Successfully window will appear.
- You will see two buttons to choose from:
- Click on the Preview button to download an HTML file containing the mailbox preview.
- Click the Save PST File button to download and save the converted MBOX file as PST.

After the download is complete, you can either store the PST file on a storage drive or open/import it into Outlook for Windows.
Conclusion
Mailbox structure is quite essential because it makes it easier to find emails in the mailbox as they are stored systematically.
The best way to convert the MBOX file to PST without losing the folder structure is to use Stellar’s free online MBOX to PST converter tool. This tool is fast, easy to use, and efficiently converts the MBOX to PST, without the need to install any software. It also ensures that your data is safe during and after conversion.
















