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Atari STAD image format
File type: Graphics file
Files with pac extension can be found as old Atari ST graphic images in STAD format.
Found 9 different file type records with the same pac filename suffix.
File type category:
Graphics file
Date updated: June 23, 2025
Record marked as obsolete and not updated for a long time.
File extension pac was used for a special Atari ST graphic format called STAD.
This format contains a header followed by a single block of RLE-compressed image data. The header is seven bytes in size and contains only information necessary to decompress the image data.
The Atari STAD pictures are viewable in XnView photo editor and manager.
Use XnView to open *.pac Atari STAD images.
Use XnView to transform *.pac files to other picture formats.
File type category:
Archive and compressed file
Date updated: November 28, 2022
File extension pac is also used in CrossePAC software for it's default archiver format.
The pac archives created by CrossePAC are specifically designed for portability across a wide range of hardware and software platforms.
CrossePAC supports making archives in any of three formats: Text, ASCII, or Binary.
Use CrossePAC to extract data from *.pac archive files.
Perhaps can be converted to other alternative archive formats using CrossePAC.
Software applications that can open pac files:
Microsoft Windows
Software apps that create pac files:
Microsoft Windows
Software apps that extract pac files:
Microsoft Windows
Software applications that handle other tasks involving pac files:
Microsoft Windows
File type category:
Archive and compressed file
Game file
Date updated: July 11, 2024
The pac file extension is also related to Desperados, a real-time tactics computer game for Microsoft Windows operating system.
This type of .pac file stores game archive including sounds, music, models, maps, graphics etc.
Use Dragon UnPACKer to open *.pac Desperados game archive.
Game archives are rarely converted, but sometimes can be extracted with modding tools.
Software applications that can open pac files:
Microsoft Windows
Software apps that extract pac files:
Microsoft Windows
Software applications that handle other tasks involving pac files:
Microsoft Windows
File type category:
Bitmap image file
Date updated: May 9, 2019
Record marked as obsolete and not updated for a long time.
The pac file extension is used for a multi-resolution image format developed by Kodak as part of the Photo CD System.
The PAC format was developed by Kodak before JPEG format became official standard. It typically achieves lesser compression rates but has better quality of images.
The pac file can probably be opened in professional photo editing tools, or in Photo-CD program bundled to older Kodak digital cameras.
Use compatible tools to work with *.pac files.
Probably can be exported to other formats.
File type category:
Audio and sound file
Date updated: February 22, 2019
The pac file extension is associated with the LPAC compressed audio file format. LPAC is a codec (coder / decoder) for lossless compression of digital audio files.
The pac file stores audio compressed with LPAC codec.
Mime types:
audio/x-pac
Use Winamp to playback LPAC lossless compressed audio files.
Probably can be exported to other formats.
Apps designed for playing pac files:
Microsoft Windows
File type category:
Game file
Date updated: December 3, 2018
Record marked as obsolete and not updated for a long time.
The pac file extension was also supposedly used by computer game from Namco called Pac-man, originally developed for arcades and Atari 2600 gaming console, latter ported for many other systems.
You cannot open this type of *.pac files directly.
This file type is not meant to be converted to anything else and it would be pointless to try to do so.
Software applications that handle other tasks involving pac files:
Microsoft MS-DOS
File type category:
Text file
Date updated: May 3, 2019
The pac file extension is also associated with Screen Subtitling Systems applications for DVD subtitling, Teletext subtitling etc., developed by Polistream.
The pac file contains subtitles stored in a Polistream native subtitle format.
Use Subtitle Editor to open *.pac Polistream video subtitle data files.
Several subtitle programs support this format and may help you with conversion of the subtitles to another format.
Software applications that can open pac files:
Microsoft Windows
Swift Create
Software applications that can edit pac files:
Microsoft Windows
Swift Create
Software capable of saving pac files:
Microsoft Windows
Swift Create
Programs for viewing pac files:
Microsoft Windows
Software apps that convert pac files:
Microsoft Windows
Software apps that import pac files:
Microsoft Windows
Software apps that export pac files:
Microsoft Windows
File type category:
Internet related file
Settings, options, themes or skins file
Date updated: June 27, 2025
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
Software apps that manage or store settings in pac files:
Microsoft Windows
Apple macOS / Mac OS X
File type category:
Audio and sound file
Date updated: November 10, 2024
Record marked as obsolete and not updated for a long time.
The pac file extension is also associated with the now discontinued SB Studio II audio software. and used for its default audio format.
The pac file stores audio data in 8 or 16-bits mono sound format, also contains loops, names, collections etc.
Use Awave Studio to playback .pac SB Studio II package files.
Although this file type is a little outdated, it should still be possible to convert it to some other audio file.
Apps designed for playing pac files:
Microsoft Windows
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