Text Encryptor
Encrypt and decrypt text with a passphrase using AES-256-GCM. Everything runs in your browser — nothing is ever uploaded.
Encrypted output
AES-256-GCM
Result will appear here…
All operations run in your browser via the Web Crypto API. No data is ever sent to a server. If you lose your passphrase, the text cannot be recovered.
How it works
1
Choose a mode
Select Encrypt to protect a message, or Decrypt to recover one from an encrypted block.
2
Enter your text and passphrase
Paste the text you want to encrypt (or the Base64 block you want to decrypt), then type a strong passphrase.
3
Click Encrypt / Decrypt
The browser derives a 256-bit key from your passphrase using PBKDF2 (100 000 iterations, SHA-256), then encrypts or decrypts using AES-256-GCM.
4
Copy or download the result
The encrypted output is a Base64 string containing a random salt, IV, and ciphertext — safe to copy, store, or share as text.