Uber-apk-signer.jar [best] -

: Uses multi-threading to speed up batch-signing operations.

Skips alignment and signing; tests if the APK is already valid. --overwrite uber-apk-signer.jar

: It comes with an embedded debug keystore . You don't need to hunt for your own .jks file just to get a quick test build running on a device. : Uses multi-threading to speed up batch-signing operations

java -jar uber-apk-signer.jar -a myapp.apk uber-apk-signer.jar

The tool automates a strict three-step lifecycle for every target APK:

[Input APK] ──> [1. ZipAlign] ──> [2. Cryptographic Signing] ──> [3. Verification] ──> [Output APK]