Having problems opening a pack file?

Find out what programs can help open, view, play or convert your pack files.

Opening pack files
Pack200 Packed Jar File

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

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What is pack file?

File created by Pack200, a utility included in Java 1.5.0 that compresses .JAR files; contains a JAR file that has been compressed by up to sixty percent; commonly used by Java Web Start clients to retrieve and unpack JAR files for Java programs. PACK files are often compressed into .PACK.GZ files. They may also be seen with the compound ".jar.pack" extension.

Software that will open, convert or fix pack files

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