jpexs-decompiler VS Recaf

If you're lucky, the developers will have used a standard format to store their assets and you can just use an existing asset extractor to do the dirty work for you: Unreal, Unity, and Flash (.swf) are some of the most popular ones.

I recently found an awesome flash decompiler[0] and used it to get around site-locking on some swfs I downloaded years ago.

Some swfs require files from the sites they are hosted on but I downloaded them and modified the swfs to find these files on a local server instead.

So cool being able to modify the source code whereas back in the day I had to rely on hex editing to invert conditionals.

[0] https://github.com/jindrapetrik/jpexs-decompiler

jindrapetrik/jpexs-decompiler: JPEXS Free Flash Decompiler (github.com)

JPEXS ffDec is amazing for decompiling them: https://github.com/jindrapetrik/jpexs-decompiler/releases

You can use "inspect element" on the page in Chrome to find the swf. Once you've got it, you can use JPEXS to dump the sound files.

For future reference, you can also extract contents of SWF files using the free program ffDec.

but if anyone finds this and is curious, JPEXS decompiler is by far the best option. https://github.com/jindrapetrik/jpexs-decompiler

I wanted to change the art that is displayed on the loading screen and wanted to ask if I'm doing it the right way. So far the instructions I've found have directed me to use something called UNREALPAK to unpack the Game.pak file, then look for the loadingScreen.swf file and decompile it with this program. After that I should be able to replace the image and, I assume, recompile and repack the loadingScreen.swf and Game.pak files respectively. Does this sound right? If so, where do I find the "UNREALPAK" tool/program? Is there a better tool/program to use for decompiling the loadingScreen.swf file? And if this isn't the correct process, would anyone be able to help me determine the best way to do this? Any help would be appreciated.

IF you've got the legal situation all sorted out, and know that you need to change a Java class file, and know how to program in Java, I'd suggest Recaf. With it, you can import a jar file, decompile, edit and recompile any source files in it, and export the whole thing again.

No one seems to mention Recaf wich is the best option IMO. You can choose between different decompilers (Fernflower, CFR, Jadx, Procyon and others) has bytecode editing capabilities (you don't have to fully decompile, you can edit the bytecode directly), built in peephole optimizations for flow and number obfuscations, various search options for methods, members, strings, and method virtualization via SSVM

Uhhh, no? For something like JavaFX, which I've complained about its bad native handling before, you can still make a multi-platform jar with a little bit of effort. For instance my project Recaf is distributed as a single JAR file. Just install JDK 11+ and you're good to go.

I did something like this, but its not its own control/library: https://github.com/Col-E/Recaf/blob/dev3/recaf-ui/src/main/java/me/coley/recaf/ui/pane/DiffViewPane.java

The decompiler they used to view that code is not very good, that output is garbled.

If you're going to take apart JVM bytecode, you're better off using Recafe or Quiltflower.

https://github.com/Col-E/Recaf

https://github.com/QuiltMC/quiltflower

I've recently been searching for tools that can help me find rats within jar files. So far I've found jd-gui and Recaf, do you all have any suggestions for other tools?

Example: DecompilePane.java

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