Real encryption, not just encoding
Many “text encryption” sites only apply Base64 or a Caesar shift, which anyone can reverse in seconds. This tool uses AES-256-GCM, the standard trusted by banks and governments, with a key derived from your password through PBKDF2-SHA-256 with 600,000 rounds to slow down guessing.
The result is a line of text starting with MT1. that you can safely paste into an email, chat or note. Only someone with the password can decrypt it — with the Text Decryption tool on this site. Everything runs through your browser's built-in Web Crypto; nothing is sent to a server.
How to encrypt text
- 1
Write your message
Notes, passwords, addresses or any private text.
- 2
Choose a strong password
12+ characters or several random words.
- 3
Encrypt
Copy the MT1. text and send or store it.
- 4
Share the password separately
For example by phone, never in the same message.
Key features
AES-256-GCM
Authenticated encryption that also detects tampering.
Strong key derivation
PBKDF2-SHA-256 with 600,000 iterations and a random salt.
Unique every time
A random salt and IV mean the same text never encrypts the same way twice.
Local only
Web Crypto in your browser; no uploads, no logs.
Classic ciphers too
Caesar, ROT13, Atbash, Vigenère and Base64 for learning and puzzles.
Common uses
- Sharing sensitive details: Send account numbers or addresses through ordinary chat safely.
- Private notes: Store encrypted notes in cloud documents.
- Learning cryptography: Compare modern encryption with classic ciphers.
Tips and good to know
- If you forget the password, the text cannot be recovered — not by us, not by anyone.
- Encrypted text must be copied completely; a missing character makes decryption fail.
- Classic ciphers are for fun and learning only. Use AES-256 for anything private.