Home : File Types : PAC File (4 File Associations)

.PAC File Extension

File Type 1Proxy Auto-Config File

DeveloperNetscape
Popularity
3.8 (28 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryWeb Files
FormatText

Text

This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

What is a PAC file?

Configuration file used by Web browsers to select an appropriate proxy server; contains a JavaScript function named FindProxyForURL that defines rules for choosing a proxy server based on a given URL; used for controlling and load-balancing Internet traffic, especially in corporate environments.

More Information

PAC files are enabled in Web browsers by entering the PAC file URL in the proxy connection settings, or by using the Web Proxy Auto-Discovery (WPAD) protocol. When executed, a PAC file returns a string with one or more proxy server URLs.

PAC files typically are hosted on a Web server and are named proxy.pac.

NOTE: Since PAC files contain JavaScript code, they may be edited with a text editor.

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Programs that open PAC files
Windows
Microsoft Internet Explorer
Mozilla Firefox
Mac
Apple Safari
Mozilla Firefox
Linux
Mozilla Firefox
Updated 2/24/2010

File Type 2PAC Subtitles File

DeveloperScreen Subtitling Systems
Popularity
3.5 (8 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryVideo Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

What is a PAC file?

Proprietary subtitles format created by Screen Subtitling Systems; used for synchronizing closed captions with a video timeline; can be edited with subtitle editing software such as EZTitles and converted to more standard formats, including .SRT and .SUB.

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Programs that open PAC files
Windows
EZTitles
Subtitle Edit
Updated 11/2/2015

File Type 3SBStudio II Song File

DeveloperSonicSpot
Popularity
2.4 (7 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

What is a PAC file?

Song format, called a PAC or package file, used by SBStudio; made up of data blocks that store song information and audio data.

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Programs that open PAC files
Windows
SBStudio II
FMJ-Software Awave Studio
Updated 2/24/2010

File Type 4STAD Graphic File

DeveloperSTAD
Popularity
2.0 (7 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryRaster Image Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

What is a PAC file?

Image format used by the STAD program for Atari ST systems; saved as a black and white image with a resolution of 640x400 pixels; considered a high-resolution graphic for Atari computers.

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Programs that open PAC files
Windows
XnViewMP
Mac
Lemkesoft GraphicConverter
XnViewMP
Updated 2/24/2010

.PAC Extension Information

This page contains information about the file extension PAC and its known file associations. Our goal is to help you understand what a *.pac file is and how to open it.

All file types, file format descriptions, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

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