PAC File - opening and understanding

Did your computer fail to open a PAC file? We explain what they are used for and recommend software that we know can open or otherwise handle your .PAC files.

What is a PAC file?

PAC stands for Proxy Auto Configuration. Files with the .pac extension are configuration files that are used by a variety of Web browsers. These files allow the browser to choose the proper proxy server. The PAC files contain JavaScript functions that define the rules used to choose a proxy server for a specific URL.

The .pac extension is also used for CrossePAC archive files, Opera files, Pacman files, Atari STAD image format files, Windows Applications Manager added or changed package files, Desperados game archive files and Photo-CD multi-resolution image files.

How to open PAC files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension PAC for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different PAC openers which you will find listed below.

Suggest another file format using extension PAC

While we know of one file format using the .PAC file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .PAC file.

Various viewers for this file format

These apps are known to open certain types of PAC files. Remember, different programs may use PAC files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Audio Creator LEAudio Creator LEUser submitted
Audio CreatorAudio CreatorUser submitted
Marvelous Designer EnterpriseMarvelous Designer EnterpriseUser submitted
Marvelous Designer PersonalMarvelous Designer PersonalUser submitted
NeroMIXNeroMIXUser submitted
CLO Show PlayerCLO Show PlayerUser submitted
SELECTSELECTUser submitted
Dragon UnPACKerDragon UnPACKerUser submitted
texView ApplicationtexView ApplicationUser submitted
PlanetPress SuitePlanetPress SuiteUser submitted
We have not verified any software that we know for certain will work with PAC-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with PAC-files. If you know one, please use the 'Suggest a program' link below and tell us about it!