AES Encryption Decryption Tool
Advanced Encryption Standard cipher with support for all major modes
Encrypt and decrypt text using the industry-standard AES algorithm. Supports CBC, ECB, CTR, OFB, and CFB modes with 128/192/256-bit keys. All operations are performed locally in your browser for maximum security.
Encryption Settings
Input Text
Encrypted/Decrypted Output
Security Notice
ECB mode is not recommended for production use as it can reveal patterns in encrypted data. Use CBC or CTR modes for better security. Always use strong, randomly generated keys and keep them secure. All encryption operations are performed locally in your browser - your data never leaves your device.
When to Use AES Encryption Tool
Secure Data Storage
Encrypt sensitive files, passwords, and personal information before storing them locally or in cloud storage services to prevent unauthorized access.
Email Communication
Encrypt confidential messages before sending via email to ensure only the intended recipient with the decryption key can read the content.
Configuration Files
Protect application configuration files containing database credentials, API keys, and other sensitive settings used in software development.
Backup Protection
Encrypt backup files and archives before transferring to external storage or cloud services to maintain data confidentiality even if storage is compromised.
API Development
Test AES encryption implementations in web applications, verify compatibility between different systems, and validate encrypted data exchange protocols.
Educational Purpose
Learn about cryptographic concepts, understand different AES modes, practice encryption techniques, and explore security principles in educational settings.
Frequently Asked Questions
What's the difference between 128, 192, and 256-bit AES keys?
The numbers refer to the key length in bits. AES-128 uses 128-bit keys (16 bytes), AES-192 uses 192-bit keys (24 bytes), and AES-256 uses 256-bit keys (32 bytes). Longer keys provide exponentially stronger security but require slightly more processing power. AES-256 is considered military-grade encryption and is recommended for highly sensitive data, while AES-128 is sufficient for most commercial applications.
Can I decrypt AES encrypted data from other tools?
Yes, as long as you have the correct encryption key, IV (initialization vector), and know the encryption mode used. Our tool supports all major AES modes (CBC, ECB, CTR, OFB, CFB) and output formats (Base64, Hex, Plain Text) for maximum compatibility with other AES implementations. The AES standard ensures interoperability across different platforms and tools.
What should I do if decryption fails?
Decryption failures usually occur due to incorrect parameters. First, verify that you're using the exact same encryption key, IV, and cipher mode that were used for encryption. Check that the encrypted data format (Base64/Hex) matches your input selection. Ensure there are no extra spaces or characters in your key or encrypted text. Our tool provides detailed error messages to help identify and resolve specific issues.
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