JSUnpack - A Generic Javascript Unpacker

JSUnpack is an online service that can unpack different kinds of obfuscated and packed javascript source codes. It is designed for security researchers and computer professionals.

You can either supply the source code or link to the javascript file to unpack it. The site also supports uploading and unpacking of PDF, pcap, HTML, or JavaScript file.

JSUNPACK website

I hope it comes handy to you as it did to me. :)