There are 11 other file types using
the PST file extension!

empty icon.pst - Lahey Fortran paste buffer

pst icon.pst - Ulead pattern image format

pst icon.pst - Yamaha pianist (solo piano) style

empty icon.pst - MIDI Studio preset

empty icon.pst - Medbasin parameter file

empty icon.pst - Mastercam post processor data

empty icon.pst - LightWave 3D preset

pst icon.pst - Apple Logic plugin settings file

empty icon.pst - ProShow Producer template

empty icon.pst - STAR-CD results data

empty icon.pst - Autodesk structure library or pipeworks structural data

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PST file extension - Microsoft Outlook personal storage table

What is pst file? How to open pst files?

File type specification:

Microsoft Office file type icon Microsoft Office file type

Email related data file type icon Email related data file type

pst file icon: pst filetype icon

The pst file extension is associated with Microsoft Outlook, an email client and personal information manager, which is part of Microsoft Office, developed by Microsoft Corporation.

The pst files store e-mail messages and other data saved by the Outlook application. PST files contain all of users Outlook email folders, including the Inbox, Calendar, and Contacts.

The pst files are stored in Unicode file format and have a 20 GB limit in Microsoft Outlook 2003, Outlook 2007 and 50 GB limit in Outlook 2010, Outlook 2013, Outlook 2016. After the limit of PST file is exceeded, Outlook will not able to open PST file and you must split pst files or create new one.

The size of pst files can be customized in the Windows registry.

Unlike the full version of Outlook, free Outlook Express or Windows Live Mail does not use .pst files.

Mac OS X (macOS) users can also use the PST Import Tool for Entourage to import PST data into Entourage.

Path to pst file:
Windows Vista, Windows 7, Windows 8, Windows 10

Microsoft Windows XP, Microsoft Windows Server 2003:
\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook

Microsoft Exchange Server also uses Outook PST file format to store address book and other personal data about contacts.

The default software associated to open pst file:

Microsoft Outlook icon

Microsoft Corporation logoMicrosoft Outlook  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Outlook is e-mail management tool and personal information manager distributed with Microsoft Office suite. Outlook integrates e-mail application, calendar, task manager, contact manager, note taking in to one application.

Microsoft Outlook is used as a stand-alone application and also can work with Microsoft Exchange Server and SharePoint Server.

The predecessor of Outlook was called Schedule+. The newest version is called Outlook 2016.

Microsoft Outlook for Mac icon

Microsoft Corporation logoMicrosoft Outlook for Mac  Apple macOS / Mac OS X software

Company or developer:
Microsoft Corporation

Microsoft Outlook for Mac is e-mail client and personal information manager distributed with Microsoft Office for Mac. Outlook for Mac contains email, calendar, address book, task list, note list managers in one application. Microsoft Outlook for Mac is a successor of Microsoft Entourage for Mac.

Office 365 icon

Microsoft Corporation logoOffice 365  Multiplatform software

Company or developer:
Microsoft Corporation

Office 365 is a subscription-based service that gives users access to several services and apps from Microsoft Office. It is available some types of subscription editions (for Home, Education, Business and Enterprise users) available for Microsoft Windows and Apple macOS and all major mobile platforms.

Related articles:

How to set size limit for Outlook files

Help how to open:

Use Microsoft Outlook.

1. On the File menu, point to Open, and then click Outlook Data File.

2. Click the .pst file you want to open, and then click OK.

The name of the folder associated with the data file appears in the Folder List (Folder List: Displays the folders available in your mailbox. To view subfolders, click the plus sign (+) next to the folder. If the Folder List is not visible, on the Go menu, click Folder List.). To view the Folder List, on the Go menu, click Folder List. By default, the folder will be called Personal Folders .

How to convert:

You can for example use Aid4Mail.

1. It converts to and from almost every major desktop mail application.

2. It can archive mail in generic, RFC-compliant and non-proprietary mailbox files -- something which (for instance) Outlook doesn't directly support.

Aid4Mail supports just about every mail application in common use: Mozilla/Netscape/Thunderbird, Outlook and Outlook Express (PST and MSG format for each), Eudora, The Bat!, Opera, Forte Agent, Pegasus, Calypso, generic Unix mailboxes, and many more. It also works natively with any Windows mail program that supports the Extended MAPI messaging standard: Outlook, Novell GroupWise, and so on.

Find conversions from pst file:

pst to csv

pst to eml

pst to ics

pst to mbox

pst to pdf

pst to txt

pst to vcf

Find converter to pst file type:

dbx to pst

ics to pst

olm to pst

ost to pst

rpmsg to pst

txt to pst

vcf to pst

File identification strings:

HEX code: 21 42 44 4E
ASCII code: !BDN

List of software applications associated to the .pst file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open pst file, edit pst file, convert pst file, view pst file, play pst file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting pst files.

Software that open pst file - Microsoft Outlook personal storage table

Programs supporting the exension pst on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open pst file action.

Microsoft Windows:

Main software associated with pst file by default:
Microsoft Outlook small icon Microsoft Outlook
Other suggested software:
Microsoft Exchange Server small icon Microsoft Exchange Server
PstViewer Pro (EML Viewer Pro)

Apple macOS / Mac OS X:

Main software associated with pst file by default:
Microsoft Outlook for Mac small icon Microsoft Outlook for Mac
Other suggested software:
Microsoft Entourage small icon Microsoft Entourage

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