Why? Because signing attaches a signature file that must remain intact. If you modify (align) an already signed APK, you break the digital signature. The workflow should always be:
You will find zipalign.exe inside the version folder (e.g., 34.0.0 ). zipalign download windows
Zipalign will not automatically overwrite an existing file unless explicitly told to do so. The workflow should always be: You will find zipalign
. To get it on Windows, you must install the Android SDK or the standalone command-line tools. Android Developers How to Get zipalign for Windows Download the SDK : The easiest way is to download and install Android Studio To get it on Windows, you must install
The easiest way to get it is through the SDK Manager . Navigate to Tools > SDK Manager > SDK Tools and ensure Android SDK Build-Tools is installed.