Free Javascript Obfuscator
- A free web based tool to protect code from unwanted examination.
- http://www.javascriptobfuscator.com/

Syntropy Chaos Engine - Javascript obfuscator
- A free of charge JavaScript scrambler/obfuscator.
- http://www.syntropy.se/index.php?ct=downloads

Javascript Compressor
- Online compressor Javascript files and get lower download times and save bandwidth. By Dean Edwards.
- http://javascriptcompressor.com

HTML Protection Rocket
- Software to compress or encrypt HTML or JavaScript [Commercial]
- http://www.marketingrocket.com/prodhpr.php

w3compiler
- JavaScript compressor/obfuscators with full JavaScript/HTML parsing produced perfect XHTML files. [Commercial]
- http://www.w3compiler.com

net.demon haywyre nullifier
- To decode pages that were obfuscated with a javascript encoder such as Haywyre or Merlin simply view the source of the page and paste it in the form below. [Online]
- http://www.netdemon.net/haywyre/

JavaScript Formatter/Obfuscator
- Tool for prettyprinting JavaScript to make it more readable, or conversely, obfuscating it to prevent reverse-engineering. [Commercial]
- http://www.semdesigns.com/Products/Formatters/ECMAScriptFormatter.html

Javascript Obfuscator
- Converts the JavaScript source code into scrambled and completely unreadable form, preventing it from analysing and theft. [Commercial]
- http://www.javascript-source.com/

Stunnix JS-Obfus
- A JavaScript source code obfuscator and encoder.
- http://www.stunnix.com/prod/jo/overview.shtml

jsjam
- Compress JavaScript so that it downloads faster to the browser. If the identifier compression is kept on, it also has a side-effect of making the JavaScript fairly unreadable.
- http://www.anvilon.com/software/jsjam/

JavaScript Compressor (JSC)
- By Creativyst. [Free online, commercial another case]
- http://www.creativyst.com/Prod/3/

Javascript Cruncher
- Free utility for compressing/removing all unnecessary tabs, spaces and comments from JavaScript files.
- http://www.cfoster.net/jscrunch/