Google Closure Compiler 是一個能壓縮和驗證 Java Script 的工具，並能最佳化程式碼。

command :
java -jar closure-compiler.jar –charset UTF-8 –js source.js –js_output_file output.js

Closure Tools : https://developers.google.com/closure/

Closure Compiler : https://developers.google.com/closure/compiler/

Download : http://closure-compiler.googlecode.com/files/compiler-latest.zip