iOS · macOS
Split large MBOX archives into individual EML messages. Fast, private, completely offline.
MailSplit takes large MBOX archive files and splits them into individual EML message files. Perfect for migrating email between providers, archiving important conversations, or extracting specific messages from bulk exports. Runs entirely on your Mac with no internet connection required.
Available on theApp StoreBreak apart monolithic MBOX files into individual EML messages. Each email gets its own file with the original subject line as the filename.
Works with archives of any size — from a few messages to hundreds of thousands. Efficient memory handling means even multi-gigabyte archives process smoothly.
Every header, timestamp, attachment, and inline image is preserved exactly. The split files are byte-perfect representations of the originals.
Built specifically for Mac using native frameworks. Drag and drop your MBOX files, pick an output folder, and go. Clean, simple, fast.
MBOX is a common email archive format used by Gmail Takeout, Apple Mail, Thunderbird, and many other email clients. It stores multiple emails in a single file.
MailSplit focuses on splitting archives into individual files. MailShift converts between email formats. Both preserve all metadata and work offline.
Yes. EML is a universal format supported by Outlook, Apple Mail, Thunderbird, and virtually every email client.
All processing is local. Your emails never leave your Mac. No cloud services, no accounts, no tracking.
Split large MBOX archives into individual EML messages. Fast, private, completely offline.
Available on theApp Store