Convert APK to JAR

Apk to jar file conversion

Direct conversion from .apk to .jar is not possible. An APK is an Android application package, while a JAR is a Java archive. They are different formats with different purposes, so there is no reliable one-step conversion that turns an Android app into a normal, runnable Java archive.

What you can do instead is extract and decompile the APK to inspect its contents. An APK usually contains .dex bytecode, resources, and a manifest file. If your goal is code analysis, you can convert the DEX bytecode to a .jar file for viewing in Java decompilers, but the result is typically not a fully rebuildable or runnable original Java project.

A common workflow is:

1. Use dex2jar to convert classes.dex into a .jar file.
2. Open the resulting JAR in a Java decompiler such as JD-GUI, CFR, or FernFlower to inspect the decompiled source.

Important: this process is mainly for code inspection. Android apps often use obfuscation, multiple DEX files, native libraries, and Android-specific APIs, so the decompiled output may be incomplete or difficult to read. Resources such as layouts, images, and the manifest are not converted into a standard Java source project by dex2jar.

If you need to examine the APK contents directly, you can also unpack it with archive tools or use Android reverse-engineering tools such as apktool, which is better suited for decoding resources and rebuilding APKs than for producing a true JAR.

In short: you can sometimes turn the DEX bytecode inside an APK into a JAR for decompilation, but you cannot directly and cleanly convert an APK into a normal Java archive that behaves like the original Android app.