CodeThatPacker is a powerful JavaScript compression utility. CodeThatPacker removes comments and whitespaces from your scripts, supports all JavaScript syntax including regular expressions and automatic semicolon insertion, can copy several js-files into one, compresses JavaScript in HTML files.
CodeThatPacker comes in two versions: attractive Wizard and command prompt tool with understandable set of commands used to compress and protect JavaScript source files. It can be installed and used in seconds. Trial version limits size of files it is capable to work with. PRO version supports all features of standard plus replaces internal variables with short names and obfuscates string constants (replaces them with escaped values).