Jad - the fast JAva Decompiler

A great way to compile Java codes in a free and quick manner. Most people want to use.
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What's New

NOTE: Jad is free for non-commercial use, but since the version 1.5.6 it's no longer free for commercial use. This means that Jad cannot be included into software products (especially decompilers) without my prior permission. If you want to use Jad (as a command-line utility or as a library) in your product(s) please contact me for conditions. At the same time, Jad can be used freely for personal needs in a commercial or non-commercial environments.

Jul 02, 2006: Minor update to version 1.5.8g for Windows and Mac OS X (Intel).
Jun 16, 2006: Added version for Mac OS X 10.4.6 (Intel).
Dec 21, 2005: changed contact email address to jad@kpdus.com.
Feb 29, 2004: Jad home page moved to /jad.html.
Dec 14, 2003: changed contact email address to kpdus@softhome.net.
Nov 23, 2001: the page moved to http://kpdus.tripod.com/jad.html.
Sep 15, 2001: updated jadAlign v1.01.
Aug 05, 2001: updated Jad 1.5.8e for Linux and Windows.
Jul 19, 2001: updated FrontEnd Plus v1.04.
Jul 15, 2001: added Jad for HP-UX 11.x.
Jul 15, 2001: updated FrontEnd Plus v1.03.
Jul 13, 2001: added jadAlign utility by Bernard Poulin.
Jul 12, 2001: updated FrontEnd Plus v1.02.
Jul 7, 2001: released the bug-fix version 1.5.8e for Windows.
Jun 18, 2001: alternative download locations removed because providing them violates the Yahoo Geocities Terms of Service.
May 19, 2001: released the bug-fix version 1.5.8d.
May 12, 2001: provided alternative download locations since many people reported difficulties with downloading Jad from Geocities (bogus authentication dialogs or 'file not found' errors).
May 06, 2001: released the bug-fix version 1.5.8c. Added versions for Mac OS X, NetBSD 1.5.
Apr 29, 2001: released the bug-fix version 1.5.8b.
Apr 17, 2001: released the bug-fix version 1.5.8a.
Apr 14, 2001: released Jad 1.5.8 (JDK 1.3-compatible) for Windows, Linux (RH 7.0) and OS/2.
Feb 20, 2001: updated FrontEnd Plus v1.00.
Nov 14, 2000: added Jad 1.5.7g for Linux (Sparc).
Oct 15, 2000: released the bug-fix version 1.5.7g. Added FrontEnd Plus v0.08.
July 7, 2000: updated FrontEnd Plus v0.07.
July 6, 2000: added Jad 1.5.7f for BeOS 5.0.
July 4, 2000: added Jad 1.5.7f for FreeBSD 4.0 and OpenBSD 2.7. Updated the Linux versions of Jad.
June 29, 2000: released the bug-fix version 1.5.7f for Windows, Linux (RH 6.2), Solaris 8 (Intel), Solaris 7 (Sparc) and OS/2.
June 23, 2000: added Jad 1.5.7e for OS/2. Added FrontEnd Plus v0.06.
June 19, 2000: released the bug-fix version 1.5.7e. Added one Q&A.
June 10, 2000: updated FrontEnd Plus v0.05.
May 25, 2000: updated FrontEnd Plus v0.04.
Apr 26, 2000: updated FrontEnd Pro v0.03.
Mar 15, 2000: updated FrontEnd Plus v0.02.
Mar 14, 2000: added decompile.el, an add-on to JDE for GNU Emacs.
Jan 18, 2000: released the bug-fix version 1.5.7d. Added one Q&A.
Jan 13, 2000: FrontEnd v1.02 was replaced with FrontEnd Plus v0.01. Added link to FrontJad - another GUI for Jad.
Jan 10, 2000: released the bug-fix version 1.5.7c.
Dec 29, 1999: updated version for Rhapsody 5.3 (fixed the 'incorrect magic' error).
Dec 20, 1999: added version for Rhapsody 5.3 (Power Macintosh, compiled by gcc 2.7.2.1). Added two Q&As to the FAQ section.
Dec 13, 1999: added a third-party GUI interface for Jad and links to other Jad-based decompilers.
Dec 04, 1999: released the bug-fix version 1.5.7a. The version for Linux compiled on RedHat 6.1.

For the list of differences from previous versions click here.

Jad main features

Mac delete garageband instruments lessons. Jad is a Java decompiler, i.e. program that reads one or moreJava class files and converts them into Java source files whichcan be compiled again.

Jad is a 100% pure C++ program and it generally works several times fasterthan decompilers written in Java.
Jad doesn't use the Java runtime for its functioning,therefore no special setup is required (like changes to the CLASSPATH variable).

Jad can be used:

for recovering lost source codes;
for exploring the sources of Java runtime libraries;
as a Java disassembler;
as a Java source code cleaner and beautifier.

Jad expects that supplied Java class files are valid ones, i.e. they can pass the Java Virtual Machine (JVM) verification successfully.

The Jad main features:

Enhanced readability of the generated source code.
Ability to comment Java source code with JVM bytecodes. Useful for verification and educational purposes.
Full support for inner and anonymous classes.
Fast decompilation and simple setup.
Automatic conversion of identifiers garbled by Javaobfuscators into valid ones.
Free for non-commercial use. If you would like to use Jad for commercial purposes, please contact me for conditions.

Known bugs and limitations

In certain cases when decompiling classes which contain inner classes,Jad cannot reliably sort out the extra arguments added to classconstructors by Java compiler. In those cases Jad cangenerate constructors with an incorrect number of arguments orcan fail to declare some local variables as final.
ZIP and JAR files are not supported.However you can unzip those files and decompile the whole class tree. Use the instructions from Readme.txt.
In those rare cases when Jad is unable to fully decompile constructs like labeled blocks with breaks or nested loops with inter-loop break/continue statements it generates the source with labels and goto statements whichreflects program's control flow and displays the message 'Couldn'tfully decompile method <name>'. Also when Jad couldn't reconstructall try-catch-finally statements it displays the message 'Couldn'tresolve all exception handlers in method <name>'.
Currently Jad ignores the contents of the Line Number Table Attributeand the Source File Attribute.
Currently Jad makes no use of the Java class hierarchy information. Consequently, Jad always chooses java.lang.Object as a common superclass of twodifferent classes and inserts auxiliary casts where necessary.
Jad doesn't handle inlined functions well.

Download Jad

Jad has a 'beta' status (see Disclaimer). Please send bug reports with attached .class files to me.

To download Jad click on links below.
These files are ZIP archives, save them with the extension .zip and verify file sizes after download.
If you get the error 'File not found', refresh the page.

Jad 1.5.8g for Windows 9x/NT/2000 on Intel platform (238600 bytes).
Jad 1.5.8g for Mac OS X 10.4.6 on Intel platform (170707 bytes, compiled by GCC 4.0).
Jad 1.5.8e for HP-UX 11.x (293214 bytes).
Jad 1.5.8e for Linux on Intel platform (214917 bytes).
Jad 1.5.8e for Linux (statically linked) (389972 bytes) - take this version if the one above crashes or displays the 'seek error' message.
Jad 1.5.8d for OS/2 (28871

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