Online JavaScript/CSS Compression Using YUI Compressor

This is a web interface to compress your JavaScript or CSS. This tool uses YUI Compressor 2.4.7.

Compress a JS/CSS code block, file or URL.
Text File(s) URL(s)

  • Paste a block of CSS or JS to compress in the area below.

  • Choose one or more files of the same type to compress.

  • Enter one or more URLs of the same type to compress.

Global Options
JavaScript Options



Further Reading

Better JavaScript Minification
In my investigation, I discovered coding patterns that prevented YUI Compressor from performing variable name replacement. By modifying or avoiding these coding patterns, you can improve the YUI Compressor’s performance.
Helping the YUI Compressor
Running your JavaScript code through YUI Compressor results in tremendous savings by default, but there are things you can do to increase the byte savings even further.
Minification vs Obfuscation
A minifier removes the comments and unnecessary whitespace from a program. Depending on how the program is written, this can reduce the size by about half. An obfuscator also minifies, but it will also make modifications to the program, changing the names of variables, functions, and members, making the program much harder to understand, and further reducing its size in the bargain.
The Elements of JavaScript Style [ Part 1 | Part 2 ]
When we talk of style here, we are not talking about fads and fashions, nor are we talking about CSS or conventions of layout or typography. We are talking about timeless qualities of expression which can substantially increase the value of a codebase. For companies whose valuations are are inextricably bound to their codebases, style should be a vital concern.

A note on Privacy

Every bit of code entered into this tool is made into a file on my server. That file is fed into the YUI Compressor which outputs a compressed version of that file. The original code is removed immediately from the server, but the compressed file sticks around for a while so you can download it. Once a day, files older than 60 minutes are removed automatically from the server.

I made my php class public a while ago. You can see what’s going on here: http://github.com/gpbmike/PHP-YUI-Compressor

I don’t read or copy any of your code. You’ll just have to take my word for it I guess.

Changelog

November 28, 2011
  • changed to YUI Compressor 2.4.7
June 13, 2011
  • added gzip download option
April 29, 2011
  • changed to YUI compressor 2.4.6
  • fixed character encoding on download link
  • added label for redirect link
March 6, 2011
  • Added option to add file by URL.
February 28, 2011
  • Finally wrote that cron job to purge old files.
October 25, 2010
  • Escape output of input.
October 6, 2010
  • Added the multiple attribute to the file input field
September 3, 2010
  • changed to YUI compressor 2.4.4
April 22, 2010
  • Use the php class I wrote for the yui compressor.
  • Privacy 'policy'
December 13, 2009
  • Download compressed file.
May 30, 2009
  • jump to output after compression
  • upload multiple files
March 10, 2009
  • fix multi-byte character handling. (thanks Alex)
January 18, 2009
  • changed to YUI compressor 2.4.2
  • added line-break option
  • added verbose option
November 7, 2008
  • changed to YUI Compressor 2.4.1
  • added some links to further reading
  • fixed utf-8 encoding
October 7, 2008
  • valid HTML markup for kicks
October 4, 2008
  • added error reporting
  • escape compressed code
October 2, 2008
  • changed to YUI Compressor 2.3.6
  • stopped escaping double quotes
  • hide command

If you have any feedback, or have a feature request, hit me up at gpbmike@gmail.com.