Securely encrypt or decrypt text using AES-256 (Symmetric Encryption).
Symmetric encryption uses a single secret key (or passphrase) to both encrypt and decrypt information. This tool specifically uses AES-256 (Advanced Encryption Standard), a robust encryption standard used by governments and security experts worldwide.
All encryption and decryption happens locally in your browser using JavaScript. Your text and passphrase are never sent to our servers. Your data remains private and secure on your own device.
To encrypt, enter your message and a strong passphrase, then click "Process". To decrypt, paste the encrypted text (ciphertext) back into the tool, use the same passphrase, and switch to "Decrypt" mode. Warning: If you forget your passphrase, there is no way to recover the encrypted data.