TextCrypt

Encrypt a text with a password, and decrypt it again.

Everything runs in your browser. Neither your text nor your password is ever transmitted.

Your text Password

What this does, and what it does not

Encryption uses XChaCha20-Poly1305, with the key derived from your password via Argon2id. The code runs entirely on your device — you can verify that in your browser’s network tab. What no web page can promise: the script is delivered by this server on every visit, so you have to trust that delivery each time. For genuinely sensitive material, a locally installed tool such as age, GPG or KeePassXC is the better choice.

There is no recovery. Lose the password and the text is gone for good.