Symmetric-Key Encryption Tool

This symmetric-key encryption tool lets you type a secret message (plaintext) and encrypt it with a password. Press Encrypt to get the ciphertext. To decrypt, paste the ciphertext, enter the password, and press Decrypt. You may also want to try the public-key encryption tool or the key generation & decryption tool.

Plaintext (unencrypted message):

Shared secret (password):

Ciphertext (encrypted message):

About this tool: This uses symmetric-key encryption (AES). Symmetric-key encryption is fast, but the sender and recipient must share a secret password. This is in contrast to public-key encryption, where no shared secret is needed.

Disclaimer: This is an educational demo and should not be used to encrypt truly sensitive information. For real security, use Signal.

Credits: This tool uses aes-js and blueimp-md5, both MIT licensed.