There are 8 other file types using
the PAC file extension!

empty icon.pac - CrossePAC archive

empty icon.pac - Pacman data

pac icon.pac - LPAC lossless compressed audio

pac icon.pac - Atari STAD image format

pac icon.pac - SB Studio II package

empty icon.pac - Desperados game archive

empty icon.pac - Kodak Photo-CD multi-resolution image

empty icon.pac - Polistream video subtitle data

PAC file extension - Proxy automatic configuration

What is pac file? How to open pac files?

File type specification:

Settings, options, themes or skins file type icon Settings, options, themes or skins file type

Internet related file type icon Internet related file type

The pac file extension is associated with the Proxy automatic configuration file.

A proxy auto-config (PAC) file defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL.

The pac file contains a JavaScript function FindProxyForURL(url, host). This function returns a string with one or more access method specifications. These specifications cause the user agent to use a particular proxy server or to connect directly.

MIME types:
application/x-ns-proxy-autoconfig

Updated: April 18, 2024

The default software associated to open pac file:

Microsoft Edge icon

Microsoft Corporation logoMicrosoft Edge  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Edge is web browser introduced in Microsoft Windows 10 operating system. It's fast and built for modern web applications and presentations. It allows users to simple share, reading and discover the Internet.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .pac file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .pac file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open pac file, edit pac file, convert pac file, view pac file, play pac file etc. (if exist software for corresponding action in File-Extensions.org's database).

Settings file type for software that use pac file - Proxy automatic configuration

Programs supporting the exension pac on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for settings pac file action.

Microsoft Windows:

Main software associated with pac file by default:
Microsoft Edge small icon Microsoft Edge
Other suggested software:
Firefox small icon Firefox
Opera browser small icon Opera browser
Google Chrome small icon Google Chrome
Safari for Microsoft Windows small icon Safari for Microsoft Windows

Apple macOS / Mac OS X:

Linux/Unix:

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