This is a small utility for extracting the React Native JavaScript bundle file from an Android APK. It can fetch the bundle either from an APK file on the disk, or from an Android package installed on a connected device (including Android virtual devices), without requiring deep knowledge of the Android Debug Bridge (ADB).

Since React Native JavaScript bundles are typically minified, the tool also runs it through jsbeautifier to get a more human-readable output.

The purpose of this tool is to give you a better idea of what your release code will look like. It may convince you to obfuscate your JavaScript bundles.

pip install -r requirements.txt

Python 3.8 or later is recommended.

To extract the bundle from an APK:

python extract.py foo.apk

To extract the bundle from connected device using adb:

python extract.py com.package.someapp

To customize the bundle filename, you can pass an additional parameter:

python extract.py com.package.someapp --bundle index.android.bundle

pytest