From mbox export to Outlook in one go

Most mail programs and services can save mail as mbox, the standard plain-text mailbox format. Gmail does it through Google Takeout, Apple Mail has Export Mailbox, and Thunderbird already stores every folder as an mbox file in your profile.

Step-by-step instructions: Gmail, Thunderbird, Apple Mail.

Sign in and start a new conversion. Drag in mbox files or whole export folders. We walk the folders for you and skip index and metadata files such as Thunderbird's .msf or Apple Mail's Info.plist. You can combine several mailboxes into one PST.

Name your PST (Outlook shows this name in the folder pane) and choose how folders are built. The total size and the matching price update as you add files.

Your browser uploads each file directly to private, encrypted cloud storage over HTTPS. Large files are split into parts that upload several at a time, and a part that fails is retried automatically. Keep the tab open until the upload finishes. You can see progress for each file and for the whole upload.

When the upload is complete you're sent to Stripe's secure checkout for the one-time price. Free tiers skip this step. As soon as Stripe confirms the payment, your conversion is queued.

A dedicated, isolated worker downloads your files, reads every message and writes a Unicode PST. The job page shows messages converted, percentage and an estimate of the time left. You can close the tab and come back later. When it finishes you get a summary: messages, attachments, folders and any messages that needed special handling.

Download the PST from your dashboard. The file stays available for 7 days, and you can download it as many times as you need in that time. After that it is deleted automatically. You can also delete it yourself straight away.

In Outlook for Windows use File → Open & Export → Open Outlook Data File or Import/Export. Outlook for Mac imports PST files through File → Import. See the Outlook import guide for every version, including the new Outlook.