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From mediawiki.org
MediaWiki extensions manual
Release status: experimental
Implementation Tag , Skin
Description Allows the inclusion of CSS style sheets within wiki pages
Latest version 1.3.0 (2022-07-19)
MediaWiki 1.35+
PHP 7.4+
Database changes No
License GNU General Public License 2.0 or later
Translate the NewPageCSS extension if it is available at translatewiki.net

The NewPageCSS extension uses the tag <css> to include a CSS in the text of the wiki page; that CSS is then put into the header of the resulting HTML, and so formats your page. If you are creating a wiki page that ends up requiring a lot of style modifiers, it's probably simpler to put them into a CSS style sheet.


  • Download and place the file(s) in a directory called NewPageCSS in your extensions/ folder.
  • Add the following code at the bottom of your LocalSettings.php file:
    wfLoadExtension( 'NewPageCSS' );
  • Yes Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.


table.uc {
    border-collapse: collapse;

.uc th {
    background-color: #f2f2f2;
    border: 1px solid black;

.uc td {
    border: 1px solid black;

.uc td.pm {
    background-color: #ffa0a0;

<table class="uc">



See also


I would like to acknowledge the author of the original extension PageCSS (Ævar Arnfjörð Bjarmason), which I have updated so it will work with current versions of MediaWiki.