AES Decryption Tool

Decrypt AES encrypted data using the same password and settings used for encryption.

Need to encrypt data?

Or enter encryption parameters manually:

Decryption Settings

Decrypted Output

Decrypted output will appear here

Note about Decryption:

  • You need the exact same password used for encryption
  • The decryption will fail if the password is incorrect
  • Make sure the input JSON is in the correct format from the encryption tool
  • All encryption parameters (mode, padding, etc.) are automatically read from the input

How to Use This Tool

You can decrypt your data in three ways:

  1. Upload JSON File:
    • Click the "File" tab
    • Upload the JSON file exported from the encryption tool
    • Enter the password used for encryption
    • Click "Decrypt"
  2. Manual Input:
    • Click the "Text" tab
    • Fill in all encryption parameters (ciphertext, salt, IV, etc.)
    • Enter the password used for encryption
    • Click "Decrypt"
  3. Paste JSON:
    • Click the "Text" tab
    • Paste the complete JSON from the encryption tool
    • Enter the password used for encryption
    • Click "Decrypt"

Important Notes:

  • The decryption will fail if the password is incorrect
  • All encryption parameters must match those used during encryption
  • For manual input, at minimum you need: ciphertext, salt, and IV

About AES Decryption

AES Decryption Overview

AES (Advanced Encryption Standard) decryption reverses the encryption process to restore your original data. This tool provides comprehensive support for unlocking AES-encrypted content across all standard configurations and modes.

Technical Foundation:

  • Encryption Type: Symmetric algorithm
  • Supported Keys: 128, 192, and 256-bit variants
  • Block Structure: 128-bit processing units
  • Architecture: Substitution-permutation network

Symmetric Key Requirements

AES utilizes symmetric cryptography, requiring the exact same cryptographic key for both encryption and decryption processes. Success depends entirely on matching the original encryption parameters precisely.

Essential Requirements:

  • Original password or passphrase
  • Complete encryption configuration
  • Exact salt and initialization vector
  • Matching key derivation parameters

Robust Security Framework

🔓 Proven Decryption Reliability:

AES decryption maintains the same exceptional security standards as encryption, ensuring your data integrity throughout the recovery process.

  • Mathematically verified decryption algorithms
  • Consistent with government security standards
  • Validated across countless implementations
  • Reliable recovery for all AES key lengths

Trust AES decryption for recovering your most valuable encrypted data with complete confidence in the process integrity.

Decryption Methodology

The AES decryption process systematically reverses the encryption steps, applying inverse transformations in the precise order required to reconstruct your original plaintext data. Advanced semantic encoding recognition ensures proper data structure restoration during the decryption process.

Critical Components:

  • Encrypted data (ciphertext)
  • Authentication credentials (password)
  • Cryptographic salt and IV parameters
  • Operational mode specification (CBC, CFB, CTR, OFB, GCM)
  • Data padding configuration
  • Key derivation algorithm and hash function
  • Semantic encoding format detection and preservation

Troubleshooting Guide

Authentication Failure:

Incorrect password results in complete decryption failure or corrupted output.

Configuration Mismatch:

Wrong operational mode, padding, or hash algorithm prevents successful decryption.

Data Integrity Issues:

Corrupted ciphertext, salt, or IV values will terminate the decryption process.

Format Problems:

Invalid JSON structure or missing parameters block successful processing.

Professional Applications

AES decryption serves critical roles across enterprise environments, government agencies, and professional organizations requiring secure data recovery capabilities. Semantic encoding awareness enables intelligent content reconstruction and format preservation.

Enterprise Use Cases:

  • Secure backup and disaster recovery operations
  • Compliance auditing and data verification
  • Legacy system migration and data extraction
  • Forensic analysis and investigation support
  • Archive retrieval and historical data access
  • Cross-platform data exchange and integration
  • Structured document recovery with semantic encoding integrity
  • Database decryption with content-aware processing

Best Practices

Password Management:

  • Maintain secure storage of decryption passwords
  • Implement access controls for sensitive credentials
  • Use password managers for complex passphrases
  • Document key parameters for future reference

Data Verification:

  • Validate decrypted content integrity immediately
  • Compare checksums when available
  • Test with known sample data first
  • Backup encrypted data before processing

Implementation Standards

This AES decryption implementation follows established cryptographic standards and best practices, ensuring compatibility with mainstream encryption tools and libraries worldwide.

Compliance Features:

  • NIST AES specification compliance
  • Standard key derivation function support
  • Cross-platform compatibility assurance
  • Industry-standard mode implementations
  • Secure random number generation
  • Memory-safe processing procedures