AES Encryption Tool
Encrypt text using AES (Advanced Encryption Standard) with multiple modes (CBC, CFB, CTR, OFB, ECB) and key sizes (128, 192, 256 bits). Free, secure, client-side AES encryption.
Configuration
Input (Plaintext)
What is AES Encryption?
AES (Advanced Encryption Standard) is a symmetric encryption algorithm adopted by the U.S. government in 2001. It encrypts data using the same key for both encryption and decryption, supporting key sizes of 128, 192, and 256 bits. AES is widely considered one of the most secure encryption standards available.
How to Use AES Encryption
When to Use AES Encryption
How AES Encryption Works
AES operates on fixed block sizes of 128 bits using substitution-permutation network (SPN) structure. It performs multiple rounds of transformations (10, 12, or 14 rounds depending on key size) including SubBytes, ShiftRows, MixColumns, and AddRoundKey operations. Different modes of operation (CBC, CTR, etc.) determine how multiple blocks are encrypted.
Common Use Cases
- Secure file encryption
- Database encryption
- VPN and SSL/TLS
- Password managers
- Wireless security (WPA2/WPA3)
- Government and military communications
FAQs
1 What AES mode should I use?
CBC (Cipher Block Chaining) is common for general use, but CTR (Counter) mode is better for parallel processing and random access. Avoid ECB mode for production use as it does not provide serious message confidentiality.
2 Is AES-256 more secure than AES-128?
AES-256 provides a higher security margin with a larger key space, but AES-128 is still considered secure against all known attacks. The choice depends on your security requirements and compliance needs.
3 Is my data safe?
Yes! All encryption happens in your browser. Your plaintext and keys are never sent to any server.