While exporting Android signed application package through Eclipse you get this warning The zipalign tool was not found in the SDK. Please update to the latest SDK and re-export your application or run zipalign manually After getting this warning I started looking for zipalign tool. After searching in SDK folder I found zipalign.exe under copy_tools folder. This folder is used by Android SDK update to keep copy of old tools. What is zipalign tool ? From Android documentation zipalign is an archive alignment tool that provides important optimization to Android application (.apk) files. The purpose is to ensure that all uncompressed data starts with a particular alignment relative to the start of the file. How to make Eclipse find this zipalign tool To make eclipse use this zipalign.exe you have to copy it in a proper SDK folder. You can find SDK folder in %android-sdk-path% / build_tools / {sdkfolder} After copying zipalign.exe to this folder when you run Eclipse to s
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