This page collects some statistics about MediaWiki extensions: number of extensions and their quality.

Number of extensions: (as of 11 August 2016)

• 719 distributed byExtensionDistributor
• 2000 (about) extensions categorised on MediaWiki.org (categoryAll extensions; it seems there are not too much other pages, the raw number if 2286)
• 7000 (about) extensions categorised on WikiApiary.com (categoryExtension; it seems there are not too much other pages, the raw number is 7661)
• 3380 extensions on MediaWiki.org (pages inExtensions: namespace, which are not a subpage but possibly a redirect; 7635 pages grand total, subpages and redirects included)

Extension quality: (as of 11 August 2016)

• 153 extensions used in production on Wikimedia websites
• 869 extensions considered stable by the community and/or their authors
• 792 extensions announced in beta version by the community and/or their authors
• 258 extensions considered as experimental by the community and/or their authors
• 219 extensions which were stable but are now unmaintained
• 532 extensions archived, i.e. no more maintained since a long time
• 88 extensions with known vulnerabilities, out of which 57 have been deleted from the MediaWiki.org website

Number of extensions: (as of 13 February 2015)

• 719 distributed byExtensionDistributor
• 2000 (about) extensions categorised on MediaWiki.org (categoryAll extensions; it seems there are not too much other pages, the raw number if 2263)
• 6000 (about) extensions categorised on WikiApiary.com (categoryExtension; it seems there are not too much other pages, the raw number is 6573)
• 3132 extensions on MediaWiki.org (pages inExtensions: namespace, which are not a subpage but possibly a redirect; 6222 pages grand total, subpages and redirects included)

Extension quality: (as of 13 February 2015)

• 146 extensions used in production on Wikimedia websites
• 827 extensions considered stable by the community and/or their authors
• 868 extensions announced in beta version by the community and/or their authors
• 247 extensions considered as experimental by the community and/or their authors
• 109 extensions which were stable but are now unmaintained
• 327 extensions archived, i.e. no more maintained since a long time
• 81 extensions with known vulnerabilities, out of which 56 have been deleted from the MediaWiki.org website

• ExtensionDistributor: askthe API on mediawiki.orgdownloadhttps://gerrit.wikimedia.org/mediawiki-extensions.txt and count the number of lines (removed byphabricator:T266024)
• MediaWiki.org category "All extensions": number of pages inCategory:All extensions
• WikiApiary.com category "Extensions": number of pages inwikiapiary:Category:Extension
• pages Extension: on MediaWiki.org: copy all titles fromSpecial:AllPages/Extension: in a text file and count the number of lines. Possibly a program could be written by using the APIhttps://www.mediawiki.org/w/api.php?action=query&list=allpages&format=json&apnamespace=102&aplimit=500, walking through the API pages, saving the titles, and removing the titles with a slash (subpages). Or possibly there is some way to directly get this number through API or web interface.
• extensions used in production on Wikimedia websites: Git repository "operations/mediawiki-config", file "wmf-config/extension-list", count the number of lines; see alsoCategory:Extensions used on Wikimedia which should be synchronised
• extensions considered stable by the community and/or their authors: number of pages inCategory:Stable extensions (I consider an extension without a page in the namespace Extension: can not be considered stable; de facto other pages in the category are mainly copies of existing extensions as well as some extensions currently in development)
• extensions announced in beta version by the community and/or their authors: number of pages inCategory:Beta status extensions
• extensions considered as experimental by the community and/or their authors: number of pages inCategory:Experimental extensions
• extensions which were stable but are now unmaintained : number of pages inCategory:Not LTS ready
• extensions archived, i.e. no more maintained since a long time: number of pages inCategory:Archived extensions +Category:Archived Semantic MediaWiki extensions
• extensions with known vulnerabilities:
  • total with known vulnerabilities: sum of all pages in category and subcategories ofCategory:Extensions with security vulnerabilities
  • total which have been deleted from the MediaWiki.org website: number of pages inCategory:Deleted extensions with security vulnerabilities

• Extensions