DevSec Pro: Offline Security
Tools
Zero permissions, 100% offline: JWT verification, AES-256 vault & crypto suite
- Price
- $4.99
- No in-app purchases
- Updated
- Sep 22
- 2026 Β· v1.0.1
Screenshots
About DevSec Pro: Offline Security
π‘οΈ DevSec Pro is the zero-permission, client-side cryptographic workbench engineered for software engineers, penetration testers, and backend architects who demand absolute privacy.
Built on a zero-telemetry architecture, DevSec Pro operates completely air-gapped from the network. Your sensitive production secrets, cryptographic tokens, and authentication payloads never touch external servers or the cloud.
π 100% CLIENT-SIDE AIR-GAP:
β’ π« Zero Permissions: No internet access (android.permission.INTERNET is completely stripped).
β’ π‘οΈ Zero Tracking: No ads, no analytics, no third-party SDKs, and zero crash trackers.
β’ β‘ Local Execution: All cryptographic operations execute within your device's protected memory buffer.
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β¨ EXCLUSIVE PRO CAPABILITIES
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1. π OFFLINE SIGNATURE VERIFICATION
Inspect, decode, and cryptographically verify JSON Web Tokens (JWT) directly on-device:
β’ Symmetric Algorithms: Verify HMAC signatures (HS256, HS384, HS512) with raw secret keys.
β’ Asymmetric Algorithms: Verify digital signatures using standard PEM public keys (RS256, RS384, RS512, ES256, ES384, ES512).
β’ Full claims dissection: Real-time validation for iat, exp, and nbf timestamps with human-readable epoch conversions.
2. ποΈ AES-256-GCM ENCRYPTED VAULT
A hardened local safe for sensitive development environment variables and infrastructure keys:
β’ Military-Grade Encryption: Authenticated AES-256-GCM cipher with unique per-entry initialization vectors (IV).
β’ High-Entropy KDF: Master password hardened via PBKDF2-HMAC-SHA256 with high iteration counts and cryptographic salt.
β’ Hardware-Isolated Storage: Store production API tokens, database connection URIs, and server credentials securely offline.
3. β‘ UNLIMITED BULK TOKEN GENERATION
Generate enterprise-grade unique identifiers and random secrets with zero limits:
β’ UUID v4, NanoID, and cryptographically secure random Hex bytes.
β’ Batch Generation: Instantly create and export batches of 100 to 1,000 keys in a single tapβno cooldowns, no rewarded passes, no timeouts.
ββββββββββββββββββββββββββ
π οΈ CORE CRYPTO & DECODER WORKBENCH
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β’ π Multi-Format Smart Decoder: Bidirectional encoding/decoding for Base64, Base64URL, Hexadecimal (Base16), URL percent-encoding, and HTML entities.
β’ β‘ Cryptographic Hashes & HMAC: Compute MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, and keyed HMAC digests.
β’ π X.509 Certificate Inspector: Parse PEM public keys (RSA/EC) and X.509 certificates to extract Issuer DNs, subject info, and validity windows.
β’ β±οΈ Clipboard Auto-Wipe: Automatic memory sanitation cleanses sensitive copied tokens from your Android clipboard after 60 seconds.
Clean, high-performance architecture built for professional developers who refuse to compromise on security.
Developed by LKPixel.
Support & Security Contact: [email protected]
Built on a zero-telemetry architecture, DevSec Pro operates completely air-gapped from the network. Your sensitive production secrets, cryptographic tokens, and authentication payloads never touch external servers or the cloud.
π 100% CLIENT-SIDE AIR-GAP:
β’ π« Zero Permissions: No internet access (android.permission.INTERNET is completely stripped).
β’ π‘οΈ Zero Tracking: No ads, no analytics, no third-party SDKs, and zero crash trackers.
β’ β‘ Local Execution: All cryptographic operations execute within your device's protected memory buffer.
ββββββββββββββββββββββββββ
β¨ EXCLUSIVE PRO CAPABILITIES
ββββββββββββββββββββββββββ
1. π OFFLINE SIGNATURE VERIFICATION
Inspect, decode, and cryptographically verify JSON Web Tokens (JWT) directly on-device:
β’ Symmetric Algorithms: Verify HMAC signatures (HS256, HS384, HS512) with raw secret keys.
β’ Asymmetric Algorithms: Verify digital signatures using standard PEM public keys (RS256, RS384, RS512, ES256, ES384, ES512).
β’ Full claims dissection: Real-time validation for iat, exp, and nbf timestamps with human-readable epoch conversions.
2. ποΈ AES-256-GCM ENCRYPTED VAULT
A hardened local safe for sensitive development environment variables and infrastructure keys:
β’ Military-Grade Encryption: Authenticated AES-256-GCM cipher with unique per-entry initialization vectors (IV).
β’ High-Entropy KDF: Master password hardened via PBKDF2-HMAC-SHA256 with high iteration counts and cryptographic salt.
β’ Hardware-Isolated Storage: Store production API tokens, database connection URIs, and server credentials securely offline.
3. β‘ UNLIMITED BULK TOKEN GENERATION
Generate enterprise-grade unique identifiers and random secrets with zero limits:
β’ UUID v4, NanoID, and cryptographically secure random Hex bytes.
β’ Batch Generation: Instantly create and export batches of 100 to 1,000 keys in a single tapβno cooldowns, no rewarded passes, no timeouts.
ββββββββββββββββββββββββββ
π οΈ CORE CRYPTO & DECODER WORKBENCH
ββββββββββββββββββββββββββ
β’ π Multi-Format Smart Decoder: Bidirectional encoding/decoding for Base64, Base64URL, Hexadecimal (Base16), URL percent-encoding, and HTML entities.
β’ β‘ Cryptographic Hashes & HMAC: Compute MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, and keyed HMAC digests.
β’ π X.509 Certificate Inspector: Parse PEM public keys (RSA/EC) and X.509 certificates to extract Issuer DNs, subject info, and validity windows.
β’ β±οΈ Clipboard Auto-Wipe: Automatic memory sanitation cleanses sensitive copied tokens from your Android clipboard after 60 seconds.
Clean, high-performance architecture built for professional developers who refuse to compromise on security.
Developed by LKPixel.
Support & Security Contact: [email protected]
What’s new
Version 1.0.1 Β· Updated September 22, 2026
Welcome to DevSec Pro v1.0.1: β’ Zero-Permission architecture: No network access requested. β’ Offline JWT Signature Verification (HS256, RS256, ES256). β’ Hardware-isolated AES-256-GCM encrypted secret vault. β’ Unlimited bulk generation & exports for UUID v4, NanoID, Hex. β’ Smart Decoder, Cryptographic Hashes & X.509 Inspector.
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| App | Rating | Price | Installs | Last updated | Compare |
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