Convert mbox to msg

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Mbox file(s) on your desktop and select Convert with Filestar.

  3. Type convert to msg in the search box.

  4. Press Convert.

  5. Or let an AI agent do it: filestarcli -i file.mbox -c "convert to msg" (how).

Let your AI agent convert MBOX to MSG

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Then ask your agent:

“Convert the MBOX files in my Downloads folder to MSG”

Or run it yourself:

filestarcli -i file.mbox -c "convert to msg"

Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.

Can my AI agent convert MBOX to MSG?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.mbox -c "convert to msg" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .mbox and .msg?

Extension
.mbox
.msg
Format
Text
Binary
Category
Email
Email
Developer
Netscape
Microsoft
Description
An MBOX file is an email mailbox saved in a mail storage format used for organizing email messages in a single text file. It saves messages in a concatenated format where each message is stored after another, starting with the "From" header. MBOX files were originally used by Unix hosts but are now supported by other email applications, including Apple Mail and Mozilla Thunderbird.
An MSG file is an email message, contact, appointment, or task created or saved within Microsoft Outlook. It may contain one or more email fields, which includes the date, sender, recipient, subject, and message body, or contact information, appointment details, and one or more task descriptions. MSG files are also compatible with other programs that use Microsoft's Messaging Applications Programming Interface (MAPI).
MIME Type
application/mbox
application/vnd.ms-outlook

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