PACK File

What are PACK files and how to open them

Are you having problems opening a PACK 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 PACK files.

What is a PACK file?

PACK files have multiple uses, and Java Packed JAR is one of them. Read more about the other uses further down the page.

Java Packed JAR File

These files are used for the deployment of apps written in the Java programming language. They are saved in a compressed format and contain what is commonly referred to as compressed JAR files. JAR files are Java applications.

When you launch a Java app using Java WebStart, packed files may be transferred to your computer and unpacked. This makes the app appear to load faster and saves download bandwidth.

How to open PACK files

Important: Different programs may use files with the PACK file extension for different purposes, so unless you are sure which format your PACK file is, you may need to try a few different programs.

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

Last updated: March 26, 2022

All known file formats using extension .PACK

While Java Packed JAR File is a popular type of PACK-file, we know of 2 different uses of the .PACK file extension. Different software may use files with the same extension for different types of data.

Git Packed Objects

We know that one PACK format is Git Packed Objects. 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 PACK files. Remember, different programs may use PACK 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 PACK file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.