PACK File Extension

PACK file icon
Pack200 Packed Jar Format
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What is PACK file?

A .PACK file is a compressed binary Jar file that is created by the Pack200 utility belonging to Java 1.5.0 software program. The PACK file containing the jar files is compressed with a compression rate of 60%, and the compressed jar files are retrieved using the Oracle Java web start clients. The retrieved and unpacked jar files are used by the Java programs. While the compressed jar files are commonly available as .PACK.GZ file, the PACK files are also associated with .jar.pack extension. The main application that uses the PACK file, Oracle Java web start application, is supported on Windows, Linux, and MAC OS.

Programs that support PACK file

We hope we helped you solve the problem with the PACK file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the PACK file (apart from the lack of the proper application installed).

First - the PACK file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the PACK file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the PACK file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the PACK file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the PACK file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on PACK file.

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