Sign up free

MBOX to EMLX Converter

Split an MBOX mailbox into Apple Mail EMLX message files, one per email. Private, in-browser.

Your files never leave your device

How to convert MBOX to EMLX

  1. 1

    Choose your MBOX file

    Click the upload area or drag files onto it. Nothing is uploaded — files are opened locally.

  2. 2

    Start the conversion

    Press the convert button. Your browser converts the files in seconds.

  3. 3

    Download the result

    Save each file individually or everything at once as a ZIP.

Move mail from Thunderbird, Gmail Takeout or another client into Apple Mail’s native per-message format. Every message in the mailbox becomes an .emlx file; download them together as a ZIP.

Read the full guide with screenshots

What is MBOX?

MBOX stores a whole mailbox — thousands of emails — in one file. Google Takeout, Thunderbird and Apple Mail exports all use it.

What is EMLX?

EMLX is the per-message file Apple Mail stores inside ~/Library/Mail: a normal EML message wrapped with a byte count and an Apple property list.

Is it private?

Yes. Unlike upload-based converters, ZapMorph processes files inside your browser tab, so the file stays on your device. It is never transmitted, stored or logged — close the tab and it’s gone.

Frequently asked questions

Is the mbox to emlx converter free?

Yes. Convert 1 file a day without an account, or 5 files a day with a free account. Pro removes all daily limits.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser, so your files never leave your device. We only count how many files you convert — never their names or contents.

What is the maximum file size?

Up to 25 MB per file without an account, 50 MB with a free account, and 1 GB on Pro. Very large files also depend on your device’s memory.

Can I convert multiple MBOX files at once?

MBOX to EMLX Converter works on one file at a time and can produce many output files, which you can download together as a ZIP.

Does it work on Mac, Windows, iPhone and Android?

Yes. It works in any modern browser — Chrome, Edge, Firefox and Safari — on desktop and mobile, with nothing to install.

Related converters

MBOX to PDF

MBOXPDF

Convert MBOX mailboxes to PDF with sender, recipients, date and message body. Private — nothing is uploaded.

MBOX to HTML

MBOXHTML

Convert MBOX mailboxes to HTML pages that open in any browser, with headers and formatting kept.

MBOX to Text

MBOXText

Extract plain text — headers and body — from MBOX mailboxes. Ideal for search, archiving and AI tools.

MBOX to JSON

MBOXJSON

Convert MBOX mailboxes to structured JSON: headers, recipients, body and attachment details.

MBOX to CSV

MBOXCSV

Export MBOX mailboxes to a CSV spreadsheet — one row per email with date, sender, subject and body.

MBOX to EML

MBOXEML

Convert MBOX mailboxes to standard EML files that open in Thunderbird, Apple Mail and Outlook.