PAC File

What are PAC files and how to open them

Are you having problems opening a PAC file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your PAC files.

What is a PAC file?

PAC files have multiple uses, and Proxy Automatic Configuration is one of them. Read more about the other uses further down the page.

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 two PAC openers that are compatible with this specific type of PAC file.

Programs that open Proxy Automatic Configuration files

Last updated: May 26, 2024

All known file formats using extension .PAC

While Proxy Automatic Configuration File is a popular type of PAC-file, we know of 9 different uses of the .PAC file extension. Different software may use files with the same extension for different types of data.

CrossePAC Compressed Archive

We know that one PAC format is CrossePAC Compressed Archive. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

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

Cydonia Game Video Format

We know that one PAC format is Cydonia Game Video Format. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Distribution Package Archive

We know that one PAC format is Distribution Package Archive. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Lossless Predictive Audio Compression Audio File

We know that one PAC format is Lossless Predictive Audio Compression Audio File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

SBStudio Music Module

We know that one PAC format is SBStudio Music Module. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Sonic's Serie Game Data Archive

We know that one PAC format is Sonic's Serie Game Data Archive. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

STAD Hi-res Bitmap

We know that one PAC format is STAD Hi-res Bitmap. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

TPAC Archive

We know that one PAC format is TPAC Archive. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

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.

Help us help others

File.org 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 submit@file.org to discuss further.