How to Export Gmail to MBOX File: 3 Easy Methods

Requirement	Google Takeout	Thunderbird	Gmail Backup Software
Cost	Free	Free client; add-on availability varies	Depends on the product
Full Gmail backup	Yes	Requires account synchronization and appropriate export steps	Supported by suitable tools
Select specific labels	Available where offered in Takeout	Depends on synchronized folders and export options	Depends on the software
Export individual messages	Not designed for individual-message selection	Possible with supported workflows	Depends on available filters
Export to MBOX	Yes	Possible with a compatible export add-on	Depends on supported formats
Export to PST or PDF	Not directly as the primary Takeout export	Requires additional workflows or tools	Available in tools that support these formats
Installation	Not required	Required	Required for desktop software
Best suited for	Free, one-time backups	Users who already manage email in Thunderbird	Filtered exports and multiple output formats

Choose Google Takeout if you want a free Gmail backup. Consider Thunderbird when you need more control over messages in a mail client. A dedicated backup tool may be more convenient when you need to filter emails or export them into different formats.

Method 1. How to Export Gmail Emails to MBOX Using Google Takeout?

Google provides a free option called Google Takeout. By using this approach, you can backup Gmail emails to MBOX file for free.

Here’s how to use it:

1. Visit https://takeout.google.com/settings/takeout and sign in.

2. Now, choose the data to include and deselect all that you don’t want to include. Click Next.

3.  Then, select the Mail option and click Next Step.

4. Choose Send a download link via email in this case.

5. Choose the Frequency, File Type & Size, and click Create Export. 

6. Google will start preparing your email archive. Once ready, you’ll receive an email with a download link.

7. Click Download Archive and extract the .zip file to get the .mbox file inside.

Open the extracted Mail folder to locate the MBOX file. Depending on your selection and the exported data, the archive may contain multiple files or additional metadata.

Your Gmail export is now saved locally.

Method 2. How to Export Gmail to MBOX Using Thunderbird

Mozilla Thunderbird is a desktop email client that allows you to access your Gmail messages on your computer. Link your Gmail account to Thunderbird and, if necessary, install a suitable export add-on (such as ImportExportTools NG) to export selected messages or mailbox folders to MBOX format.

This method is handy if you want to have more control on the messages you export instead of downloading a complete Gmail archive using Google Takeout.

Step 1. Download and install Mozilla Thunderbird on your computer.

Step 2. Open Thunderbird, add your Gmail account, and complete Google’s sign-in and authorization process.

Step 3. Allow Thunderbird to download the required emails and folders before starting the export.

Step 4. Install ImportExportTools NG if it is compatible with your Thunderbird version.

Step 5. Choose the Gmail messages or folder you want to export. Use the add-on’s available export options to select the appropriate content.

Step 5. Choose the MBOX export option, select a destination folder on your computer, and start the export.

Step 7. Locate the saved MBOX file and open it in a compatible email client. Check a few messages and attachments to confirm that the export worked correctly.

Note: Thunderbird requires synchronization before export, and available options depend on the add-on version. Large mailboxes may take longer to process.

Why Thunderbird?

If you already use Thunderbird to manage your Gmail, you can use it to export specific messages or folders. Google Takeout is generally easier if you want a simple, free archive of your Gmail data. If you need advanced filters or multiple output formats, you might want to consider a dedicated Gmail backup tool.

Method 3. Export Multiple Gmail Accounts into a MBOX File – Reddit Recommendation

If Google Takeout feels difficult to manage or you don’t have Thunderbird installed, you may want to explore an alternative way to backup Gmail emails to MBOX. Users discussing Gmail backup and email export on Reddit may also provide different approaches based on their needs, mailbox size, and access permissions.

One option is the Advik Gmail Backup Tool,which may be suitable for this workflow. It can let you export Gmail emails to MBOX file in bulk. Just click on the Batch mode feature and add all your email account details in a CSV file. It may also be useful when you need to export several Gmail accounts into an MBOX file. It will export all emails from Gmail into MBOX file along with attachments.

Steps to Follow

Step 1. Launch the software and connect the first Gmail account using its supported authentication process.

Step 2. Select the required folders or labels from the preview.

Step 3. Here, choose MBOX as the output format.

Step 4. Choose a destination folder on your computer.

Step 5. Start the export and wait for the process to complete.

Repeat the process for your other Gmail accounts, using separate destination folders where practical.

Verify the resulting MBOX files by opening them in a compatible email client.

Now, you will be automatically redirected to your chosen location. Access all your exported Gmail emails in MBOX file.

Watch Video Tutorial

How to Check Whether Your Gmail MBOX Export Is Complete

Downloading the archive does not automatically mean that all the messages you wanted to export are there and readable. Before you trust the backup, verify the results.

Perform these checks after exporting MBOX to Gmail.

Verify the archive downloaded

Make sure the download is complete and you are able to open or extract the ZIP file. In case the archive is divided into several numbered or separate parts make sure you have downloaded all the parts you need for the export.

Find the MBOX file

Open the extracted folder and verify that the expected MBOX file or files are present. The number of files will depend on the choices made during export and how the data was organized.

Open the exported mailbox

Import the MBOX file into a supported email client or use a suitable mailbox reader. Check that the messages open and that the dates, senders, recipients, and subjects are what you expect.

Check attachments

Open a few messages that had attachments (originally). Make sure that attachments are accessible and that files open correctly.

Compare a subset of messages

Search Gmail for a few messages that you know should be in the export Check details against imported or archived copies.

Don’t forget to check important folders and labels for a complete mailbox backup. Don’t assume the export is complete just because the archive downloaded okay.

Conclusion

Exporting Gmail to MBOX is a workable solution to make a local copy of your email data. Start with Google Takeout, a free one-time backup. It lets you download your Gmail data and access the MBOX file once the archive is extracted.

Use Thunderbird if you need to work with selected messages, with a compatible export workflow. If you want to filter or save Gmail messages in PST, PDF, or other supported formats, you can use a dedicated backup or conversion tool.

No matter which method you select, check out the exported messages and attachments before you think the MBOX file is your only backup.