Open PST and OST files without Outlook

MailTrove opens Outlook data files on your PC, with no Outlook and no email account. Your archive is read where it is and never changed.

Which PST and OST files it opens

PST files from any version of Outlook: the old ANSI files from Outlook 97 to 2002 and the Unicode files Outlook has written since, large archives included. A 2 GB PST opens in under a second, and big folders scroll smoothly.

OST files too, including the one left behind by a computer, an email account or a job that no longer exists. MailTrove reads it directly, so it doesn't matter that the profile it belonged to is gone.

Open a PST file

  1. Get MailTrove from the Microsoft Store. It's free to download.
  2. Choose File > Open and pick the .pst or .ost file, or drag it onto the window.
  3. Every folder appears with its emails listed. Choose one to read it, with its attachments.

What you can do with it

  • Browse every folder; sort and filter by date, sender, unread, flagged and attachments.
  • Read emails with pictures from the sender blocked until you choose to load them.
  • Open and save attachments, including emails attached to emails.
  • See the calendars, contacts, tasks and notes in the archive, each in a view of its own.
  • Search every word of every email and the text inside attachments (PDF, Word, Excel, PowerPoint), across one archive or several.
  • Export folders or search results to EML files, one MBOX file or PDFs, or save just the attachments.

Rescue mail from an orphaned OST

An OST is Outlook's offline copy of a mailbox, tied to the profile that made it, so Outlook won't open one on another computer. When the mailbox itself is gone, that file may be the only copy left. MailTrove opens it like any other archive, and the full version exports everything in it to EML or MBOX, which other email apps import, or to PDF.

Free to start

The free version never expires. It lists every email in every folder and reads the 10 newest in each, with their attachments, and searches subjects and senders. The full version reads everything and adds full search, conversations and export, for $29.99 once (plus any tax), not a subscription. See pricing.

Get MailTrove

Free from the Microsoft Store, for Windows 10 or later. A Mac version is coming to the Mac App Store.

Get it from the Microsoft Store

Other files MailTrove opens: OLM files, MBOX and Gmail Takeout, MSG and EML files. Questions? See support.