[javascript] Is there a good JavaScript minifier?

What JavaScript minifier do you recommend?

YUI minifier

Pretty Diff - http://prettydiff.com/?m=minify

Sometimes i use this: http://closure-compiler.appspot.com/home

There are several you can use/try:

• YUI compressor
• jsmin
• Microsoft Ajax minifier (has hypercrunching)

JavaScript Minifier gives a good API you can use programatically:

curl -X POST -s --data-urlencode 'input=$(function() { alert("Hello, World!"); });' http://javascript-minifier.com/raw

Or by uploading a file and redirecting to a new file:

curl -X POST -s --data-urlencode '[email protected]' http://javascript-minifier.com/raw > ready.min.js

Hope that helps.

Active

• Closure Compiler
• UglifyJS2

Deprecated

• YUI Compressor
• UglifyJS

Google Closure Compiler generally achieves smaller files than YUI Compressor, particularly if you use the advanced mode, which looks worryingly meddlesome to me but has worked well on the one project I've used it on:

Several big projects use UglifyJS, and I've been very impressed with it since switching.

This tool: jscompressor.com is pretty good.

If you are using PHP you might also want to take a look at minify which can minify and combine JavaScript files. The integration is pretty easy and can be done by defined groups of files or an easy query string. Minified files are also cached to reduce the server load and you can add expire headers through minify.