Lock a message with a password before you send it by WhatsApp or email. Only someone with the password can unlock it, and everything happens in your browser.
loading toolHow to lock and unlock a message
- Type your message.
- Choose a password and press Lock / unlock.
- Send the locked text, and share the password a different way (for example, by phone).
Good to know
- Locked text starts with
GCO1:. Paste it back here with the password to unlock it.
Questions
How strong is it?
AES-256-GCM, with the key made from your password by PBKDF2 (310,000 rounds). A long password of 4 or more random words is the real protection.
I forgot the password. Can you open it?
No one can. There is no back door and nothing is stored on our side.
Is my data private?
Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.
Is it free?
Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.
