Make an encrypted message you can paste into iMessage/SMS. Recipient uses the same key to decrypt. AES-GCM PBKDF2

Message (plaintext)

Key / Password

Tip: For iMessage, the smooth move is: encrypt → copy bundle → paste into Messages.

Encrypted Message (ciphertext payload)

Need an extra-strong code? Generate one here, copy it, or insert it into BlkNote. Everything happens in your browser.

Advanced options (length & character sets)

Length Character sets

a-z A-Z 0-9 symbols

Your new secret code

Send a private note in 3 steps: 1. Write 2. Choose a secret code 3. Send the encrypted note

Everything happens in your browser. We never see your note or your code.

Your note

Secret code

Share this code with your friend in any way you like. They'll need it to read the note.

Encrypted note

Send by SMS (optional)

Paste encrypted note Secret code

Revealed note