PAC File Type

- The quick facts

What are PAC files and how to open them

Are you having problems opening a PAC file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a PAC file?

PAC files have multiple uses, and Proxy Automatic Configuration is one of them.

Proxy Automatic Configuration File

These files are configuration files that allow a web browser to choose the proper proxy server for a URL. The PAC file contains a JavaScript function that defines the rules to select a proxy server for a specific URL.

Configuring proxies this way is beneficial for laptop users who need several different proxy configurations or in complex corporate setups with many different proxies.

How to open PAC files

We have identified 2 PAC openers that are compatible with this specific type of PAC file.

Programs that open Proxy Automatic Configuration files


Last updated: June 29, 2022

More file formats using the PAC extension

Through our research of PAC files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • CrossePAC Compressed Archive
  • Distribution Package Archive
  • Lossless Predictive Audio Compression Audio File
  • SBStudio Music Module
  • STAD Hi-res Bitmap
  • TPAC Archive

Various apps that use files with this extension

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

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about PAC file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.