APK Signature Checker - Verify APK Signing Scheme v1 v2 v3 Online

🔒 APK Signature Checker

Check which signing schemes (v1, v2, v3) an APK uses and view signer fingerprints

✓ v1 / v2 / v3 ✓ Signed Status ✓ SHA-256 Fingerprints
📦
Drop APK file here
Or click to select (max 100MB)
app.apk

About APK Signature Checker

🔑 v1 JAR Signing

The legacy scheme that signs individual files inside META-INF. Still required for older Android versions.

🔒 v2 & v3 Schemes

Whole-file APK signing blocks that are faster to verify and protect against tampering. v3 adds key rotation.

📈 Fingerprints

View SHA-256, SHA-1 and MD5 fingerprints of the signer certificate to confirm the app's identity.

🔒 Privacy

The APK is analyzed in memory and never stored. Detection runs entirely on the server without external tools.

Checking signature...

Encoding and Data Utilities

Encode, decode, measure sizes, and transform common formats.

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