APK signature checker

APK Signature Checker is a powerful Android extension that allows you to examine the signature information of installed applications right from your device, eliminating the need for PC tools like keytool or jarsigner. With this extension, you can verify if different apps share the same signature, inspect sharedUserId relationships, and check signature permissions to understand app linkages.

Key features include viewing application signatures with detailed hash values (MD5, SHA-1, SHA-256), outputting signature data in tab-delimited text format for easy sharing or analysis in tools like Excel, and referencing other apps' signatures to better understand keystore details and validity periods. Although it does not support analyzing APKs saved on the SD card currently, it offers a simple and secure method to verify app signatures directly on Android devices, making it ideal for developers and users concerned about app authenticity and security.