KeyStoreViewer: App Signatures
Inspect app and APK signing certificates, fingerprints, and public keys.
- Developer
- Seiko
- License
- GPL-3.0-or-later
- Package
com.seiko.keystoreviewer- Category
- System
- Latest version
- 1.3.1 · Oct 1, 2026
- Minimum Android
- Android 7.0
Screenshots
Description
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.
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.
All versions
| Version | Released | Minimum Android | Size |
|---|---|---|---|
| 1.3.1 | Oct 1, 2026 | Android 7.0 | 3.1 MB |
| 1.2.1 | Sep 12, 2026 | Android 7.0 | 3.1 MB |
| 1.2.0 | Sep 11, 2026 | Android 7.0 | 3 MB |
| 1.1.0 | Sep 9, 2026 | Android 7.0 | 1.4 MB |
| 1.0.0 | Jul 21, 2024 | Android 7.0 | 1.4 MB |
How to install an older version of an Android app · How to install an APK file on Android
From the developer (GitHub)
APK files published by the developer on GitHub. They are signed by the developer and may not install over the other builds on this page (different signature). Links open github.com.
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