File Extension Search

.pac File Extension

Developer: Netscape
File type: Proxy Auto-Config File
You're here because you have a file that has a file extension ending in .pac. Files with the file extension .pac can only be launched by certain applications. It's possible that .pac files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .pac file?

The configuration files mostly used by various web browsers for the selection of an appropriate proxy server are known as PAC files; which is why PAC files are also called Proxy Auto-Config Files. PAC files are categorized as web files because they contain JavaScript functions that are used in defining the rules needed to choose a proxy server based on the URL given. PAC files are very vital in corporate environments wherein websites are utilized for business processes as these files have the ability to control and load balance internet traffic that goes into a certain website. Web browsers enable PAC files when the PAC file URL found in the proxy connection settings is entered. These files can also be enabled by web browsers through the use of the Web Proxy Auto-Discovery (WPAD) protocol. A proxy.pac web server usually hosts PAC files and when these files are executed, a string containing numerous proxy server URLs is returned by the PAC file. PAC files can be edited with the use of a text editor because they contain JavaScript codes.

how to open a .pac file?

Launch a .pac file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .pac file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .pac files aren't yet associated with it. In this case, when you try to open a .pac file, you can tell Windows which application is the correct one for that file. From then on, opening a  .pac file will open the correct application. Click here to fix .pac file association errors

applications that open a .pac file

Apple Safari

Apple Safari

Apple Safari is a type of Web browser that is integrated on most Mac computers, particularly those with operating systems Mac OS X and iOS. However, there is also a version of this Web browser found in later versions of Microsoft Windows, which are Windows 7, Windows Vista and Windows XP. Many features are found and designed on Safari, which include the following: a resizable Web search box using Yahoo!, Google or Bing, bookmark management and integration with Address book, inbuilt password management using Keychain, bookmark search with history, expandable text boxes, option to save webpage clips that are viewable on Apple Dashboard, auto-fill of Web forms, support for ICC color profile, PDF viewing, integration of iPhoto, private browsing, popup ad blocking tool, Quartz style font smoothing, spelling checker, Web feeds reading and subscription, mail integration, and support for CSS animation and CSS 3 Web fonts. Among the newest and improved features are Smart Search field, iCloud tabs, tab view and sharing of photos or posting of status to Facebook or Mail.
Mozilla Firefox

Mozilla Firefox

Mozilla Firefox is a free and open source Web browser created for Microsoft Windows, OS X, and Linux, harmonized by Mozilla Corporation and Mozilla Foundation. Firefox utilizes the Gecko layout engine to provide Web pages, which implements present and projected Web standards. The Multiple Network Graphic is stored in files with MNG format and is attach with MNG file extension and is utilized as format for graphic images animation. These are normally categorized as raster image files that symbolized PNG for Web animation. These files substituted GIF animations and make use of either lousy or lossless data compression, having the basic structure and portion as the PNG format but with a extra compound signature and larger range of portions used for animation. They contain bitmap indexed colors works in animations, slide shows, or complex still frames, composed of multiple PNG or JPEG Network Graphic (JNG) single-image data streams like PNG. The first version MNG 1.0 was introduced on Jan 31, 2001 and some of its known supporters are Gwenview, Mozilla, Netscape, Sony Ericsson and Sphere game engine.
Google Chrome

Google Chrome

Google Chrome is a web browser that was developed by Google and is being offered for free. Webkit rendering engine is being used in order to display different web pages. It allows its users to have the capability of creating shortcuts on their desktops which has the ability to launch different web applications using the browser. Users have the ability of installing different themes for Google Chrome which can be done by accessing option. Google Chrome was released in three different channels which are the Beta, Developer and Stable. A beta version was released for Android which allows its users to synchronize this with the ones that they have on their desktop in order for them to have the same browser tabs as well as bookmarks together with hardware acceleration and page pre-rendering. An iOS version was also released for Apple devices.
Microsoft Internet Explorer

Microsoft Internet Explorer

Microsoft Internet Explorer or most commonly known as Internet Explorer was developed by Microsoft in 1995. It is a graphical web browser which is included as part of the different versions of Microsoft Windows operating systems. It is one of the commonly used browsers of most Windows users. Since its first release in 1995, different versions have come out, the latest one being the Internet Explorer 10. It was designed in order to give its users the capability of viewing large range of web pages and at the same time be able to give its users features that can be used within the operating system that is installed on their computer which includes Microsoft Update. It uses the same accessibility framework which was also provided in computers that run Windows. It is also known as an interface being used when running FTP.

a word of warning

Be careful not to rename the extension on .pac files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .pac. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.
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