AES encrypt / decrypt
Uses AES-256-GCM with a key derived from your passphrase via PBKDF2 (100,000 iterations). Everything happens in your browser — nothing is sent anywhere. You need the exact same passphrase to decrypt.
Encrypt
Decrypt
What is AES encrypt / decrypt?
AES is the industry-standard symmetric encryption algorithm — the same passphrase both encrypts and decrypts, unlike RSA's public/private key pairs. It's what's actually doing the encrypting inside HTTPS, disk encryption, and password managers.
How to use it
Enter text and a passphrase to encrypt; paste the result back with the same passphrase to decrypt. Uses AES-256-GCM with a key derived via PBKDF2, entirely in your browser — nothing is transmitted anywhere.
Example
Encrypting "Meet at 9pm" with a passphrase produces a random-looking
Base64 string; decrypting it with the same passphrase recovers the original text exactly.