CSSTidy is a CSS minifier

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v2.0.0 2022-01-10 15:58 UTC


CSSTidy is a CSS minifier

  • css_optimiser.php is the web-interface
  • class.csstidy.php is the parser
  • bin/pcsstidy is the standalone command line executable

This class represents a CSS parser which reads CSS code and saves it in an array. In opposite to most other CSS parsers, it does not use regular expressions and thus has full CSS3 support and a higher reliability. The downside of not using regular expressions is a lower speed though. Additional to that it applies some optimisations and fixes to the CSS code.


$csstidy = new csstidy();

// Set some options :
$csstidy->set_cfg('optimise_shorthands', 2);
$csstidy->set_cfg('template', 'high');

// Parse the CSS

// Get back the optimized CSS Code
$css_code_opt = $csstidy->print->plain();


  • v2.0.0 :
    • PHP 7.1 is the minimal version. Compatible PHP 8.0 and 8.1
  • v1.7.3 :
    • fix bug and notice on reverse_left_and_right option
  • v1.7.1 :
    • fix deprecated with PHP 7.4
  • v1.7.0 :
    • provide bin/pcsstidy for command line usage
    • support nested @media and @supports rules
  • v1.6.5 :
    • fix warnings with PHP 7.3
  • v1.6.4 :
    • preserve important comments (starting with !) in the minification /*! Credits/Licence */
  • v1.6.3 :
    • border-radius shorthands optimisation, reverse_left_and_right option
  • v1.5.7 :
    • PHP 7 compatibility, composer update, Travis CI integration
  • v1.5.6 :
    • fixes minor bugs, mainly on CSS3 properties/units
  • v1.5.2 :
  • v1.4 :
    Is the new version coming from master branch (corresponds to the initial trunk of svn repository) after beeing stabilized
  • v1.3 branch corresponds to the last stable relase published by the author.
    It integrates some bugfixes and a 1.3.1 version has been taged Since the original project (http://csstidy.sourceforge.net/index.php) has been suspended here is the import of https://csstidy.svn.sourceforge.net/svnroot/csstidy on 2010-11-14

Only PHP version is here maintained


Copyright 2005-2007 Florian Schmitz
Copyright 2010-2019 Cedric Morin

CSSTidy is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

CSSTidy is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.


Original Tracker : http://sourceforge.net/tracker/?group_id=148404&atid=771415