Open PST Files Online

What a PST file is

A .pst file is an Outlook data file. It holds a mailbox archive: folders, emails with their attachments, and sometimes contacts and calendar items. People meet PST files when they change jobs or computers, when an old account is closed, or when IT exports a mailbox. They can be many gigabytes, and nothing but Outlook opens them by default.

How to open it on Windows and Mac

• Outlook for Windows opens a PST file through File, Open and Export, or by adding it as a data file.
• On a Mac, support depends on the Outlook version, and the new Outlook does not open PST files the way the Windows one does.
• Neither Windows nor macOS has another built-in app that reads PST.
• To read the emails without Outlook, drop the file on this page.

When the free web viewer is enough

• You want to find one email or one attachment in an old archive.
• The page shows the folder tree and the list of emails with sender, subject and date. You can filter by subject or sender, read the text or HTML body, and save attachments.
• The archive is the newer format, from Outlook 2003 and later. The file is read in small pieces, so big archives open fast. It shows the first 20,000 emails of a folder.
• Nothing is uploaded. Email bodies are shown in a locked frame: scripts, web pictures and forms are blocked, and links open in a new tab.

When it is not enough

The old Outlook 97 to 2002 format is not opened, and a damaged file shows a message. Embedded messages are not saved, and large attachments are better saved in the app. The page does not search across all folders or export emails. For the whole archive, Mailattic for Windows opens PST files of any size, searches by sender, subject, date and text, saves all attachments at once and exports emails as EML, MBOX or PDF, with no Outlook, no account and no subscription. It is a paid app from the LCTR Store, for Windows only. On a Mac, the web viewer is the simplest way to read a PST.

What this page shows

The folder tree, the list of emails with sender, subject and date, the body of the email you pick (text, HTML, or the text of a formatted body) and its attachments. The file is read in small pieces, so big archives open fast.

Private: nothing is uploaded

The PST is read inside your browser. It is never sent to a server. Email bodies are shown in a locked frame: scripts, web pictures, forms and redirects are blocked, and links open in a new tab.

Questions