Open PST files in your browser
A whole Outlook mailbox in one file, exported or archived from Outlook on Windows. Open one of any size right here, its folders as Outlook had them. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your mailbox opens as a folder in the file list, with a folder for each of its own, and each email you pick opens as mail apps show it.
- Every folder • Emails by date
- Emails, contacts and calendars • Each in its own viewer
- Search • Find any email by its subject
- Export • Save as ZIP or Extract all
About PST
A PST is where Outlook on Windows keeps mail it doesn't leave on a server: every folder, email, contact, appointment and task in one file, organized as a database of its own, which Microsoft documents as MS-PST. Outlook 2003 moved it to Unicode and lifted its 2 GB limit, and files of tens of gigabytes are common.
People get PSTs when Outlook archives old mail, when a mailbox is exported to move to a new computer or to leave a job, and in legal discovery. Opening one has always meant having Outlook on Windows.
Filepeek reads the file in pieces, so one of any size opens, and lists its folders as Outlook had them. Each email opens in the mail reader with its attachments, contacts open as cards, and appointments and tasks open in the agenda with their repeats. Save as ZIP or Extract all writes them out as EML, vCard and iCalendar files any app opens.
Outlook Data File
.pst
Format
- MIME type
- application/vnd.ms-outlook
- Made by
- Microsoft
- Released
- 1997
Inside the file
- Folders
- Inbox, Sent Items and your own
- Emails
- With attachments, in HTML, rich text or text
- Contacts and calendar
- Contacts, groups, appointments and tasks
- Written by
- Outlook on Windows
Opens in every browser
Browsers download PST files for Outlook to open. Filepeek opens them in Chrome, Edge, Firefox and Safari, however big the file.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open a PST file without Outlook?
Drop it on this page or choose Peek a PST. Its folders open in the file list, and each email opens when you pick it, on a Mac or a phone too.
Can it open a big PST?
Yes. The file is read in pieces, only what's needed, so a PST of tens of gigabytes opens too.
Can I get the emails out?
Yes. Choose Export, then Save as ZIP or Extract all. Every email is written as an EML file any mail app opens, contacts as vCards and appointments as iCalendar files.
What about contacts and the calendar?
Contacts and groups open as cards, and appointments and tasks open in the agenda, with their repeats in words.
Is my file uploaded?
No. The file opens inside your browser and never leaves your device.