有许多免费的JavaScript混淆工具;然而，我认为重要的是要注意，很难混淆JavaScript到不能进行逆向工程的地步。

为此，我在一定程度上使用了几个选项:

YUI Compressor. Yahoo!'s JavaScript compressor does a good job of condensing the code that will improve its load time. There is a small level of obfuscation that works relatively well. Essentially, Compressor will change function names, remove white space, and modify local variables. This is what I use most often. This is an open-source Java-based tool. JSMin is a tool written by Douglas Crockford that seeks to minify your JavaScript source. In Crockford's own words, "JSMin does not obfuscate, but it does uglify." It's primary goal is to minify the size of your source for faster loading in browsers. Free JavaScript Obfuscator. This is a web-based tool that attempts to obfuscate your code by actually encoding it. I think that the trade-offs of its form of encoding (or obfuscation) could come at the cost of filesize; however, that's a matter of personal preference.

有许多免费的JavaScript混淆工具;然而，我认为重要的是要注意，很难混淆JavaScript到不能进行逆向工程的地步。

为此，我在一定程度上使用了几个选项:

YUI Compressor. Yahoo!'s JavaScript compressor does a good job of condensing the code that will improve its load time. There is a small level of obfuscation that works relatively well. Essentially, Compressor will change function names, remove white space, and modify local variables. This is what I use most often. This is an open-source Java-based tool. JSMin is a tool written by Douglas Crockford that seeks to minify your JavaScript source. In Crockford's own words, "JSMin does not obfuscate, but it does uglify." It's primary goal is to minify the size of your source for faster loading in browsers. Free JavaScript Obfuscator. This is a web-based tool that attempts to obfuscate your code by actually encoding it. I think that the trade-offs of its form of encoding (or obfuscation) could come at the cost of filesize; however, that's a matter of personal preference.

解释型语言的问题在于，你要发送源代码才能让它们工作(除非你有一个字节码的编译器，但话说回来，反编译是相当简单的)。

因此，如果您不想牺牲性能，您只能对变量和函数名进行操作，例如。用a, b…aa、ab……或者a101 a102等等。当然，尽可能多地删除空间/换行符(这就是所谓的JS压缩器所做的)。 如果您必须实时加密和解密字符串，那么混淆字符串将会对性能造成影响。加上一个JS调试器可以显示最终值…

你不能保护客户端代码:只需在谷歌Chrome上按F12，暂停javascript执行，你就会得到所有的字符串，即使是那些加密的。美化它和重命名变量，你会得到几乎原始的代码。

如果你正在编写服务器端javascript(即NodeJS)，害怕有人入侵你的服务器，并想让黑客的工作更加困难，给你更多的时间来取回你的访问权限，那么使用javacript编译器:

你需要在高级编译中使用闭包编译器，因为它是唯一重命名所有变量的工具，即使这些变量在多个文件/模块中使用。但它有一个问题:它只有在你用它的编码风格写的时候才能工作。

我正在使用闭包编译器实用程序的java脚本混淆。它减少了代码，并为混淆提供了更多的选项。 此实用程序可在谷歌代码在以下URL: 闭包的工具

但是现在我听到很多关于UglifyJS的消息。你可以在闭包编译器和UglifyJS之间找到各种比较，其中Uglify似乎是赢家。 UglifyJS:一种可以与闭包媲美的快速Node.js压缩器

很快我就给了UglifyJS机会。

与大多数其他答案相反，我建议反对YUI压缩机;你应该使用谷歌闭包。

不是因为它压缩更多，但主要是因为它会捕捉javascript错误，如a = [1,2,3，];这让IE失去了控制。