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AES Encryption

Securely encrypt and decrypt text using the Advanced Encryption Standard.

Whenever possible, your data never leaves your device. Your security is our priority.

Encrypt Message

Decrypt Message

About this Tool

The Advanced Encryption Standard (AES) is a symmetric-key encryption algorithm established by the U.S. National Institute of Standards and Technology (NIST). It is used globally to secure sensitive data, from classified government documents to your daily web traffic.

"Symmetric" means the exact same secret key (passphrase) is used to both encrypt and decrypt the data. Without the correct key, AES ciphertext is mathematically considered unbreakable by modern computing.

How to Use

1

Encrypt Data

Enter your sensitive plaintext and create a strong secret key. The tool will generate a Base64-encoded ciphertext string.

2

Store or Share

You can safely store the resulting ciphertext or send it over unencrypted channels. Just ensure you share the secret key via a separate, secure method.

3

Decrypt Data

Paste the ciphertext and the correct secret key into the Decrypt panel to instantly reveal the original message.

Frequently Asked Questions

Yes. The encryption and decryption happen entirely within your browser's memory using local JavaScript. We do not transmit your plaintext, ciphertext, or secret keys to any external servers.
If you lose the secret key, the encrypted data is gone forever. There is no 'password reset' or backdoor to recover AES-encrypted information.
The underlying algorithm generates a random cryptographic 'salt' and Initialization Vector (IV) every time you press encrypt. This ensures that even identical messages produce completely different ciphertexts, preventing pattern analysis attacks.