Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

You can read more about Closure Compiler at http://code.google.com/closure/compiler/

Use it through our web application at http://closure-compiler.appspot.com/

Or download a command-line tool at http://closure-compiler.googlecode.com/files/compiler-latest.zip

The Closure Compiler javadocs are available at http://closure-compiler.googlecode.com/svn/trunk/javadoc/index.html

You can browse the source at http://code.google.com/p/closure-compiler/source/browse/#svn/trunk