Tools

Phrase Encryptor

Encrypt and decrypt text with a passphrase using AES-256-GCM authenticated encryption. Useful for quickly obfuscating a message you want to send — paste the ciphertext back in with the same passphrase to recover the original.

Message

Passphrase

How it works

AES-GCM with a 256-bit key.
Key derived from your passphrase with PBKDF2-SHA-256, 200k iterations, and a random 16-byte salt.
A fresh 12-byte IV is generated per encryption. Salt + IV are bundled with the ciphertext, so the same passphrase can decrypt it later.
Everything runs in your browser. Your message and passphrase never hit the network.