Tools · Open source
KeyStoreViewer: App Signatures
Seiko
Inspect app and APK signing certificates, fingerprints, and public keys.
Opens the official F-Droid page
About KeyStoreViewer: App Signatures
Find the signing information you need for Android apps.
KeyStoreViewer helps developers inspect signing certificates from installed apps and APK files. View MD5, SHA-1, and SHA-256 certificate fingerprints and public key information without digging through command-line output.
KEY FEATURES
• Inspect the signing information of installed apps.
• Open an APK file to view its signing certificates.
• View MD5, SHA-1, and SHA-256 certificate fingerprints.
• View public key information, including the modulus for RSA keys.
• Copy fingerprints and public key values, or share signature details.
BUILT FOR EVERYDAY DEVELOPMENT
• Find the certificate fingerprints required by APIs and third-party SDKs.
• Retrieve signature and public key information for app registration.
• Investigate signing differences between debug and release builds.
Certificate fingerprints identify signing certificates. They are not APK file checksums, and a matching signature alone does not guarantee that an app is safe.
How to install KeyStoreViewer: App Signatures
- Tap Download — the app's official page on F-Droid opens.
- Install it with the F-Droid app (recommended, for automatic updates), or use the download button on that page.
- If Android asks, allow the F-Droid app or your browser to install apps, then tap Install.
- Open KeyStoreViewer: App Signatures from your app drawer.




