Having problems opening a PAC file?

We have programs that can open or convert your PAC files.

Opening PAC files

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

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension PAC

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the PAC file format or software that uses files with the PAC suffix, please do get in touch - we would love hearing from you.