Cipher Lock

Real AES-256 encryption, generated and checked entirely in your browser. Nothing you type here is ever sent anywhere.

Message 0 characters

Passphrase

Encrypted result

Type a message and a passphrase to see the encrypted result.

Nothing leaves your browser. Encryption and decryption run locally with your browser's built-in Web Crypto API. Your message, passphrase, and ciphertext are never transmitted, logged, or saved. Only which tab you last used is remembered on this device.