File extension PAC
| File type | Atari STAD Image Format |
| Developer | Netscape |
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What is a PAC file?
File with a PAC extensions contains data used in automatic configuration of a web browser in order to use a proxy, a JavaScript with FindProxyForURL function which defines rules for choosing a server. They are stored in text form, therefore they can be edited even in a simple text editor, however, they are usually located on a server and have a default name – proxy.PAC.
PAC files are usually utilised within corporations in order to control access to web sites and to balance data flow within a network. When used in a browser, their function covers providing a URL address of a file for proxy settings and initiating Proxy Auto Discovery (WPAD) protocol. PAC script, after being executed, returns an address of one or several proxies.
Program(s) that can open the .PAC file
How to open PAC files
If you cannot open the PAC file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports PAC among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the PAC file can be found in the table. Now just download and install the appropriate application.
Possible problems with the PAC format files
The inability to open and operate the PAC file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the Atari STAD Image Format file. Below is a list of possible problems.
- Corruption of a PAC file which is being opened
- Incorrect links to the PAC file in registry entries.
- Accidental deletion of the description of the PAC from the Windows registry
- Incomplete installation of an application that supports the PAC format
- The PAC file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the PAC file.
- Drivers of equipment used by the computer to open a PAC file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the PAC file should operate with your programs without any problem. If the problem with the PAC file has not been solved, it may be due to the fact that in this case there is also another rare problem with the PAC file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .a4p | Adobe Authorware Package Without Runtime |
| .a5w | Adobe Authorware Unpackaged Format |
| .adr | Opera Bookmarks Format |
| .aex | Greetings Card Format |
| .alx | BlackBerry Application Loader Format |
| .an | Adobe Edge Animate Project Format |
| .ap | Fifth Generation Systems Active Page Format |
| .aro | SteelArrow Script Format |
This extension
can be converted to:
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.PAC) you have two ways to do it. The first and the easiest one is to right-click on the selected PAC file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the PAC file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. PAC) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.