## JavaScrypt Encryption and Decryption

This page allows you to encrypt text with a specified key, yielding an encoded message, and decode encrypted messages, recovering the original text. All encryption is performed entirely within your Web browser using the JavaScript language (which, obviously, must be enabled in order to use this page). Nothing is sent to any Web site when you encrypt or decrypt a message!

Enter the key to be used to encrypt or decrypt the data in the field below. If Text is checked, the key may consist of any sequence of up to 1024 characters; if Hexadecimal is checked, the key is given as a sequence of hexadecimal digits. The Generate button may be used to create a key in either text or hexadecimal format. Encoding options include Codegroup, Hexadecimal, and Base 64.

You can, if you wish, download a copy of this page and the JavaScript programs it includes to your own computer and use it even when you're not connected to the Internet. For this purpose, you may prefer the monolithic “lean” version with documentation removed and all JavaScript programs embedded into a single Web page.