Keystore Viewer

Keystore & Certificate Viewer is a fast, local-only developer utility designed to open, inspect, and verify Java KeyStores and X.509 security certificates directly on your Android device.

Whether you are an Android developer, security analyst, or DevOps engineer, Keystore Viewer lets you inspect keystore entries, view full certificate chains, check fingerprint hashes, and verify validity dates without requiring a computer or remote server.

100% LOCAL & PRIVATE PROCESSING
Your security is our top priority. Keystore Viewer operates completely offline on your device. Keystores, private keys, passwords, and certificates are NEVER transmitted, uploaded, or logged anywhere.

SUPPORTED KEYSTORE & CERTIFICATE FORMATS
• Java KeyStore (JKS)
• PKCS#12 / PFX (.p12, .pfx)
• BouncyCastle KeyStore (BKS)
• PEM Encoded Certificates (.pem, .crt, .cer)
• DER Binary Certificates (.der)

COMPREHENSIVE CERTIFICATE DETAILS
• Subject & Issuer Distinguished Names (CN, O, OU, C, L, ST)
• Validity Period & Expiration Badges (Valid, Expiring Soon, Expired)
• Fingerprint Hashes: SHA-256, SHA-1, MD5 (One-tap copy)
• Public Key Algorithm & Key Size (RSA, EC, DSA)
• Serial Numbers in Hexadecimal and Decimal formats
• Certificate Chain Hierarchy (Leaf, Intermediate, and Root CA)
• Extensions: Subject Alternative Names (SAN), Key Usage, Extended Key Usage (EKU), SKI/AKI
• PEM Certificate Export and System Sharing

KEY FEATURES
• Quick File Picker & Recent Files history
• Full-text search and alias filtering by Entry Type (Private Key, Trusted Cert, Secret Key)
• Password-protected Keystore decryption prompt
• Integrated Light & Developer Dark Theme support
• Intent support to open keystore files directly from file managers or email attachments

DISCLAIMER
Keystore Viewer is a read-only inspection tool intended for developers and system administrators. It does not extract or export raw unencrypted private key bytes. Users are responsible for managing their keystore passwords securely. This application is provided "as-is" without warranties of any kind.