This is a simple web-app I made ages ago that encrypts and decrypts simple text with a password.
It uses the mcrypt class in PHP, and the data is passed via AJAX.
EDIT (10th June 2019): I’ve added a security certificate (thanks to Let’s Encrypt SSL), due to popular demand. Make sure you are visiting the correct URL.
EDIT (18th June 2026): I have decided to discontinue this app, and have replaced it with https://ghosttype.ramin.io which uses AES256
