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Browse by file type:
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.PAC File Extension3 File Associations
TIP: Run a free scan for .PAC file extension errors.
| File Type 1 |
Proxy Auto-Config File (Most common) |
| Popularity |
 Common |
| Category |
Web Files |
| File Description |
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.
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. |
| Program(s) that open pac files |
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Mac OS |
 Apple Safari
Mozilla Firefox
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Windows |
Microsoft Internet Explorer
Mozilla Firefox
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Linux |
Mozilla Firefox |
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| Sponsored Links |
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| Updated 2/24/2010 |
 Fix file extension .PAC errors. |
| File Type 2 |
SBStudio II Song File |
| Popularity |
 Uncommon |
| Category |
Audio Files |
| File Description |
Song format, called a PAC or package file, used by SBStudio; made up of data blocks that store song information and audio data. |
| Program(s) that open pac files |
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Windows |
SBStudio II
FMJ-Software Awave Studio |
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| Sponsored Links |
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| Updated 2/24/2010 |
Fix file extension .PAC errors. |
| File Type 3 |
STAD Graphic File |
| Popularity |
 Rare |
| Category |
Raster Image Files |
| File Description |
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. |
| Program(s) that open pac files |
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Mac OS |
Lemkesoft GraphicConverter
XnView
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Windows |
XnView |
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| Updated 2/24/2010 |
Fix file extension .PAC errors. |
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