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.
![](https://i0.wp.com/www.ramin-hossaini.com/wp-content/uploads/2019/06/2019-06-09_181040.png?resize=554%2C495&ssl=1)
App can be found here: https://dev.ramin-hossaini.com/encrypt/