PACK JAR
File conversion

Convert PACK to JAR

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Is it possible to convert PACK to JAR?
Yes - PACK converts to JAR.

The core operation: decompress the Pack200 file back to a runnable JAR with unpack200 from a JDK 8-13 (unpack200 app.pack app.jar). For a .jar.pack.gz, GZIP-decompress first or let unpack200 handle the .gz. After Java 14 the tool is gone, so keep an old JDK around.

Also to JAR: JAVA · DEX · JAD

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert PACK to JAR

Converting a .PACK file to .JAR lets you open the content in software that prefers the .JAR format, though some details may change compared with the original. We are still putting together the list of programs that handle .PACK files.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

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