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JarInspector is a utility to work with jar files (.jar, .war, .ear).

What's New

Version 1.0.1: Release notes were unavailable when this listing was updated.


  • Mac OS X 10.4 or later
  • Java 1.4.2 or later

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JarInspector User Discussion

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Distractme Member IconComment+0

Works for me in OS X 10.6.x Snow Leopard after I copied /usr/lib/java/*dylib (8 files) over from 10.5.x Leopard.

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Version 1.0.1
Surfspirit Member IconReview+442

Excelent but not compatible with Snow Leopard Java 1.6, there's here an alternative http://java.decompiler.free.fr/?q=jdgui#downloads

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Version 1.0.1
Tom E. Gun Member IconComment+39
Tom E. Gun

I would ask for an updated version to work with Snow Leopard and new Java version.
This is a really useful application. Thanks!

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Version 1.0.1
MarcelT Member IconComment+5

I am still not able to run JarInspector on Snow Leopard.

It immediately fails after starting it (see below).

Any news or suggestion?

Nov 22 16:41:46 MacBurp [0x0-0x1cb1cb].com.cgerdes.ji[53027]: [Deprecated] CocoaJava: com.apple.cocoa.foundation.NSRuntime
Nov 22 16:41:46 MacBurp jarinspector[53027]: com.apple.cocoa.foundation.NSRuntime
Nov 22 16:41:46 MacBurp [0x0-0x1cb1cb].com.cgerdes.ji[53027]: -[NSJavaVirtualMachine initWithClassPath:] FATAL: cannot initialize ObjCJava. Exit
Nov 22 16:41:46 MacBurp com.apple.launchd.peruser.501[718] ([0x0-0x1cb1cb].com.cgerdes.ji[53027]): Exited with exit code: 255

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Version 1.0.1
DandelionRex Member IconComment+1

JarInspector doesn't work with Java 1.6. The application won't start.

Console output:

3/17/09 9:47:02 AM [0x0-0x339339].com.cgerdes.ji[17556] _NSJVMLoadLibrary: NSAddLibrary failed for /System/Library/Frameworks/JavaVM.framework/Versions/1.6/Libraries/libjvm.dylib
3/17/09 9:47:02 AM [0x0-0x339339].com.cgerdes.ji[17556] -[NSJavaVirtualMachine initWithClassPath:] cannot load Java virtual machine library
3/17/09 9:47:02 AM jarinspector[17556] Unable to find class: com.cgerdes.ji.JarInspectorApplication, exiting
3/17/09 9:47:02 AM com.apple.launchd[244] ([0x0-0x339339].com.cgerdes.ji[17556]) Exited with exit code: 1

Reply0 replies
Version 1.0.1
Christoph Gerdes (Developer) Member IconDev+0
Christoph Gerdes (Developer)

This should have been fixed since 1.0RC2. Let me know if problems persist.

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Version 1.0rc4
Thorsten-Heit Member IconComment+5

Looks quite nice :-)

Unfortunately this program cannot be started when it is copied to a case-sensitive HFS+ volume:

"You cannot open the application ''JarInspector'' because it may be damaged or incomplete."

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Version 1.0rc1
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> 4 1


Current Version (1.x)


Downloads 9,817
Version Downloads 5,829
Type Development / Java
License Free
Date 17 Aug 2007
Platform OS X / PPC 32 / Intel 32
Price Free
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