AES Encrypt/Decrypt

AES (Advanced Encryption Standard) is a symmetric encryption algorithm widely used to secure data. It supports key sizes of 128, 192, and 256 bits. This tool uses AES-GCM (Galois/Counter Mode) by default, which provides both encryption and authentication. AES is the gold standard for encrypting data at rest and in transit.

Enter a password and your plaintext to encrypt. The tool generates a secure ciphertext in Base64 format. To decrypt, paste the Base64 ciphertext and the same password. A random salt and IV are generated for each encryption to ensure the same plaintext produces different ciphertexts every time.

AES-GCM provides authenticated encryption — it verifies that the ciphertext has not been tampered with. AES-CBC requires a separate HMAC for authentication. GCM is the recommended mode for most use cases.