APK Signer Pro

An open-source, modern Android application for signing, verifying, extracting, backing up, and managing APK, APKS, and XAPK package files directly on Android devices, using pure Kotlin and Jetpack Compose.

Features

Signing and verification

- v1 APK signing: legacy JAR-based APK signing for older Android versions - v2 APK signing and verification: full-file binary integrity protection for Android 7.0+ - v3 APK signing and verification: key rotation and cryptographic lineage support for Android 9.0+ - v4 APK signing: streaming signature generation with .apk.idsig support for Android 11.0+ - 16 KB and 4 KB page alignment: automatically aligns native .so libraries and resources.arsc for modern Android compatibility - Multi-format keystores: supports JKS, PKCS12, BKS, BKS-V1, UBER, and BCFKS - Built-in debug key: sign APKs instantly using the standard Android Studio debug credentials - Certificate inspection: view certificate algorithm, validity period, subject, issuer, and SHA-256 fingerprint before saving a keystore - Persistent credentials: associates passwords with saved key records for faster signing without repeated prompts

Package management

- APK backup and extraction: back up and extract APKs from installed user and system applications - Split APK support: handle split APK bundles and .apks packages - APK and package management: install, share, copy paths, or remove generated files directly from the application - APK, APKS, and XAPK support - Signing history: store and manage previous signing operations locally - Search and filtering: quickly find records across signing history and installed applications - Reactive local storage: SQLite persistence with Kotlin Flow for responsive data updates - Organized file storage: automatically stores backups and signed packages in dedicated directories under Downloads/APKSigner/ - Secure installation and sharing: uses Android's FileProvider and system sharesheet for secure file handling

Material 3 Expressive UI

- Material 3 Expressive: modern Android interface built entirely with Jetpack Compose - Dynamic colors: automatically adapts to the system wallpaper color palette - Light and dark themes: full support for system-based light and dark themes - Collapsing top app bars: smooth nested scrolling across primary screens - Live terminal logs: colorized signing and execution logs with step indicators - One-tap log copying: quickly copy terminal output to the clipboard - Responsive layouts: designed for a clean and consistent experience across Android devices

Interface language:

- English

Disclaimer

APK Signer Pro is an independent, open-source project. It is not affiliated with, endorsed by, or sponsored by Google LLC or any third party. All trademarks and product names are the property of their respective owners.

License

Apache 2.0