Convert PST, OST, MBOX & EML
mailboxes in seconds
Morfomail is a fast, private Mac app that turns Outlook PST and OST files — as well as MBOX and EML — into clean MBOX or EML output, with built-in integrity verification. All on your device.
Everything runs locally on your Mac. Your mailboxes never leave your computer.
Any mailbox in, an open format out
Drop in a .pst, .ost or .mbox file, or a folder of .eml messages.
Simple, fast, and completely private
Built natively for macOS to do one job exceptionally well.
Convert in seconds
A native, optimized engine processes even large mailboxes quickly — no waiting around, no cloud queue.
100% private & local
Every conversion happens on your Mac. Nothing is uploaded, tracked, or sent to any server. Your email stays yours.
Integrity verification
Built-in checks confirm every message is converted faithfully, so you can trust the output is complete and intact.
Truly native for Mac
Designed for macOS with a clean, lightweight interface that feels right at home — fast to launch and easy to use.
MBOX & EML output
Export to open, portable formats that work with Apple Mail, Thunderbird, and most modern email tools.
PST, OST, MBOX & EML
Read Outlook data files — including orphaned OST files — plus existing MBOX and EML, without needing Outlook installed.
How it works
Three steps from a locked-in mailbox to an open, portable format.
Open your file
Drop in a .pst, .ost, .mbox file or an .eml folder. No Outlook required.
Choose a format
Pick MBOX or EML depending on where you want your mail to go.
Convert & verify
Morfomail converts in seconds and verifies integrity — ready to use anywhere.
Need help?
Questions, feedback, or a mailbox that won't convert? We're happy to help — reach out and we'll get back to you.
support@morfomail.comDo I need Outlook installed to use Morfomail?
No. Morfomail reads PST and OST files directly, so you can convert mailboxes even without Microsoft Outlook installed.
Are my emails uploaded anywhere?
Never. All conversion happens locally on your Mac. Your data is never uploaded, shared, or tracked.
What's the difference between MBOX and EML?
MBOX stores an entire mailbox in a single file (great for Apple Mail and Thunderbird). EML stores each message as an individual file — handy for archiving or moving specific emails.
How do I report a problem?
Email support@morfomail.com with a short description of what happened. Including your macOS version helps us respond faster.