FILExt - The File Extension Source

Details for file extension .PST are on this page. Because there is no central registry for file extensions and their associated programs there may be multiple entries on this page. And, because there are many (some say over a million) such associations not all may be listed here.

TIP: Click here to run a FREE scan for .PST related errors.

Windows can't open .PST files?
If Windows is unable to open files with the extension .PST you may not have the appropriate program installed or, you may have registry errors. To help, we strongly recommend you run this free registry scan.

A search on the file extension you submitted shows 9 record(s). The details for each of these are shown below. The best FILExt can do for you is provide the details we know about. Selecting the information that applies to your particular situation is up to you. Use any hints provided. If the information here is not helpful, FILExt is sorry; but as a research site FILExt cannot provide personal support. If you need further information you might try the research tips on the FILExt Help Me page.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Outlook Personal Folder File		Microsoft Corporation
Specific Notes [What's This?]
This file includes all E-mail folders, addresses or anything else that Outlook 97, 2K or XP collects. It has a 2GB file size limit. When approaching the 2GB limit, if Office SP-1 is not installed, Outlook becomes extremely unstable to the point of not being able to clicking on any message, folder, etc. without locking Outlook. To shrink the file, delete items from their folders and then clear the Deleted Items folder using Tools | Empty Deleted Items Folder. Outlook will compress the folder in the background while the computer is idle so you may not see a size decrease immediately. Microsoft has a free add-in for backing up PST files. Microsoft also has a tool called Exchange 2000 Tool: PST2GB which will repair a PST file that is too large. USE CAUTION with this tool as it simply truncates the file to a size Outlook can handle and MAIL WILL BE LOST in the process. You can make the PST file portable (maybe on a USB device) by doing the following. (1) Make certain Outlook is not using the PST file (usually directly after a restart with Outlook not loaded). (2) Copy the PST file to the USB device (or other location you want for the file) and rename the original so Outlook can't find it (be certain to change the extension from PST but save the file as a backup to the copy you made). (3) Start Outlook and when it complains it can't find the PST file and asks where it is point it to the new location for the file (USB device or whereever you wanted it). Outlook should then always look for the file in this location so you can move it from computer to computer this way. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		MS Knowledge Base Article Outlook Recovery Toolbox Outlook Express Repair Outlook 2003 Add-in: Personal Folders Backup Exchange 2000 Tool: PST2GB
Identifying Characters [What's This?]
Hex: 21 42 44 4E ASCII: !BDN
Program ID [What's This?]
PSTFile webfile WEBFile
General Notes [What's This?]
(None)
This is record 9551 last modified on 2008-10-12 and created on 2003-01-14.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
BMail Postbox File
Specific Notes [What's This?]
(None) Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
Note: This entry has not yet been verified by FILExt. It was submitted to the list and appeared to be accurate; however, no verification links have so far been found on the Internet. Please use this association data with that in mind.
This is record 9547 last modified on 2003-01-14 and created on 2003-01-14.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Lahey Fortran Paste Buffer
Specific Notes [What's This?]
(None) Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
Note: This entry has not yet been verified by FILExt. It was submitted to the list and appeared to be accurate; however, no verification links have so far been found on the Internet. Please use this association data with that in mind.
This is record 9548 last modified on 2003-01-14 and created on 2003-01-14.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
LightWave 3D Preset		NewTek
Specific Notes [What's This?]
LightWave offers modeling, animation, dynamics, volumetric rendering, particle effects and a motion picture quality rendering engine with unlimited render nodes. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		Downoadable Presests - Site 1 Downoadable Presests - Site 2
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 14592 last modified on 2007-05-22 and created on 2003-05-29.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Mastercam Post Processor File		CNC Software, Inc.
Specific Notes [What's This?]
Mastercam has solutions for milling, turning, wire EDM and design. This file is usually in the .\MILL6 folder. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
	CAD/CAM	None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 9549 last modified on 2005-03-26 and created on 2003-01-14.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Medbasin Parameter File		National Technical University of Athens, Laboratory of Reclamation Works & Water Resources Management
Specific Notes [What's This?]
Medbasin is a windows-based program used to produce the daily or monthly hydrograph of a river. The main data inputs of the program are the average precipitation and potential evapotranspiration (or pan evaporation) of the basin. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 18806 last modified on 2005-12-13 and created on 2005-12-13.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
MIDI Studio Preset File		MAGIX
Specific Notes [What's This?]
Preset for the mixer filters; save file for the user defined edits to the flanger, chorus, eq, daft, cutoff and many other filters. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 16974 last modified on 2004-06-28 and created on 2004-06-28.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Ulead Pattern		Corel Corporation
Specific Notes [What's This?]
(None) Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
		XnView
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 9552 last modified on 2003-01-14 and created on 2003-01-14.

Extension: PST
Program and/or Extension Function [What's This?]		Company [What's This?]
Yamaha Pianist (Solo Piano) Style		Yamaha Corporation of America
Specific Notes [What's This?]
This file type is used by the Tyros2 and other high-end Yamaha keyboards. Recommended: Find PST errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
	Audio	None
Identifying Characters [What's This?]
Hex: 4D 54 68 64 ASCII: MThd
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 23697 last modified on 2008-09-23 and created on 2007-02-25.

System Info for File Extension .PST

FILExt has been given permission to display the file extension database produced by the Associate This! program. Some of that data has already been included into the main FILExt database; but, not all. Those entries which have not yet been incorporated are shown below in the hope that they will be of some use. Data collected by FILExt on registered file extensions from user systems is also in the display. Be aware this is raw data which may require further research on your part to fully understand. In particular, look at the Program ID. Often a company will put the program's name into the short ID that Windows uses to open registered file extensions. If that's not the case, look at the complete path to the EXE file. Often, programs will install themselves into directories that give either the program or company name. The program name itself may also be used as the EXE file name. These listings are particularly important since they represent listings that are in actual use by users who have sumbitted data to FILExt and therefore these listings can point you to the most likely candidate should there be multiple entries in the FILExt main database.

Program Name and MIME Type Info for File Extension .PST

FILExt has been given permission to display a Program Name/MIME type database collected by Anthony R. Nemmer. Some of that data has already been included into the main FILExt database; but, not all. Those entries which have not yet been incorporated are shown below in the hope that they will be of some use. Be aware this is raw data which may require further research on your part to fully understand. MIME type listings often contain the name of a program or, at a minimum, a type of file as the leading text in the MIME type.

General Info

• If the extension you are looking for is of the form .??_ the file is likely a compressed file and part of an install routine. When the install program runs it will expand the file and replace the underscore with the proper letter for the file type.
• If the file is sent as an audio file with any three-character extension it may be a dictation file where the extension is the dictator's initials; playable by BCB Voice Systems software (see ??? extension). The file could likewise be a dictation file in TrueSpeech format. Use Windows Sound Recorder and/or Media Player to play these back.
• If the extension you are looking for has a number at the end or is only a number and there were no results consider entering the same extension format using zero or one as some programs produce numbered split files but when the split can be extensive (e.g., .000-.999) only the first entry is in the database.

Need more information about any entries on this page? Try a Google search using terms in the above information along with words like "format," "convert," "conversion," and even "hacking." A search box is provided here for your convenience.

If you have a minute you also might wish to take a survey to get rewards.