I use Javascript to power the Apps on ubercow.com for your (and my) own security. No network traffic is generated by these processes so no one sitting on the network between the server and your computer can see what is being generated. Also the server itself cannot see what the website is doing. Every function is computed by your (and my) own web browser on your computer. If someone sees the password you've generated, base64 that was decoded, or package being tracked, it's because they're either already broken into your computer, or they're somehow looking at your screen. The javascript is 'packed', feel free to unobfuscate it you will see that there is nothing fishy there. Your and my privacy and security is of my utmost concern when using these apps.