What is File Extension PST?

Did someone email you a PST file and you're not sure how to open it? Maybe you have found a PST file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a PST file related error message.

Before you can open a PST file, you'll need to figure out what kind of file the PST file extension refers to.


Tip: Incorrect PST file association errors can be a symptom of other underlying issues within your Windows operating system. These invalid entries can also produce associated symptoms such as slow Windows startups, computer freezes, and other PC performance issues. Therefore, it highly recommended that you and other issues related to a fragmented registry.


PST files are Data Files primarily associated with Ulead Pattern (Corel Corporation).

PST files are also associated with Medbasin Parameter File (National Technical University of Athens Laboratory of Reclamation Works & Water Resources Management), Outlook Personal Folder File (Microsoft Corporation), Mastercam Post Processor File (CNC Software Inc.), Lahey Fortran Paste Buffer, Yamaha Pianist (Solo Piano) Style (Yamaha Corporation of America), BMail Postbox File, MIDI Studio Preset File (MAGIX), LightWave 3D Preset (NewTek) and FileViewPro.

Additional types of files may also be using the PST file extension. If you are aware of any other file formats using the PST file extension, please so that we can update our information accordingly.

How To Open Your PST File:

PST File Opener

The fastest and easiest way to open your PST file is to double-click it. This allows the intelligence of Windows to decide the correct software application to open your PST file.

In the case that your PST file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit PST file extensions.

If your PC opens the PST file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating PST file extensions with the wrong software program.

We highly recommend for invalid file associations and other related registry issues.

Software Downloads Associated with File Extension PST:

  • FileViewPro* ()
  • Ulead Pattern (Corel Corporation)

* Some PST file extension formats can be opened in binary format only.


PST File Analysis Tool™

Unsure about which type of PST file you have? Do you want to know exactly what it is, who created it, and how to open it?

Finally, you can now discover everything you need to know about your PST file... instantly!

The revolutionary PST File Analysis Tool™ scans, analyzes, and reports back every detail about your PST file. Our patent-pending algorithm quickly analyzes your file, and within moments, presents this information to you in an elegant, easy-to-read format.†

In seconds, you will learn exactly what type of PST file you have, the software program associated with your file, the publisher who created it, its security safety status, and a variety of other useful information.

To begin your free file analysis, simply drag-and-drop your PST file inside the dotted lines below, or click "Browse My Computer" and select your file. Your PST file analysis report will then be displayed directly below in this browser window.

File Analysis Icon

Drag & Drop Your PST File Here To Begin Analysis

Please also scan my file for viruses

† PST File Analysis Tool utilizes third-party software components. Click here to read the legal disclaimer.


About The Author: is the President and CEO of talonlibre Corporation, a global software company focused on providing innovative utility software. He is a lifelong computer geek and loves everything related to computers, software, and new technology.

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