Extensions

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See also: Fandom's Extensions and Fandom's Extensions category
**Extensions** are features and add-ons developed for MediaWiki, the software platform that Fandom runs on. They are designed by Fandom staff or third-party developers for either expanding the function of a wiki or overriding a built-in MediaWiki feature for customization purposes.

You can check if a wiki has an extension installed by going to Special:Version and looking under the "installed extensions" section or checking the extension's parser function or tag against the "tags" and "hooks" section at the bottom of that page. Fandom already has a significant number of extensions enabled by default.

If Fandom does not offer a particular extension, you may request the Fandom engineering team investigate installing it by using the contact form and linking to the MediaWiki extension page along with some rationale as to why it's needed. Please be aware that the engineering team may take a few months to review the extension. Fandom will consider whether the extension is up to date, is well-maintained, and allows for a caching layer.

Special:WikiConfig is available to Fandom staff, Wiki Specialists, and Wiki Representatives. With it, they are able to enable or disable extensions, or retrieve a list of all the wikis with a particular extension installed.

## Extensions active by default

This section was taken from Fandom's Extensions active by default, and may not be current.
See also: Fandom's Extensions enabled by default category
### Users and admins

Global CSS and JS
Adds global user CSS and JavaScript to all wikis, fetched from English Community Central.
### Wiki tools

CategoryTree
AJAX based gadget to display the category structure of a community.
CharInsert
Allows creation of JavaScript box for inserting non-standard characters.
Cite
Adds <ref[ name=id]> and <references/> tags, for citations.
CLDR
Contains local language names for different languages, countries, currencies, and time units extracted from CLDR data.
Comments
Way to leave a quick message on a blog post or article page.
Community Page
Provides a page for the community, to list things that need to be done on the wiki.
DPLforum
DPL-based forum extension using article pages.
EasyTimeline
Editors can create timelines of events using this tool's syntax.
EmbedVideo
Embeds videos from popular sources directly in pages.
ImageMap
Allows client-side clickable image maps using `<imagemap>` tag.
InputBox
Allow inclusion of predefined HTML forms.
Interactive Maps
Adds a map creation tool to create a JSON based map.
Labeled Section Transclusion
Allows transclusion of parts of pages rather than just whole pages.
Math
Adds syntax for on-page math formulas.
Maps Extension
Easily create Earth-based maps with wiki-fied markers.
Message Wall
Communication tool that allows users to send public messages to other users.
MsUpload
Tool built into the source editor to upload multiple images.
ParserFunctions
Enhance parser with logical functions.
Poem
Adds `<poem>` tag for poem formatting.
Portable Infobox
Adds the portable infobox XML syntax to present a summary of the topic of the page.
RandomImage
Provides a random media picker using `<randomimage />`.
RandomSelection
Displays a random option from the given set.
RSS
Embeds RSS feeds from any site onto a page.
Scribunto
Framework for embedding scripting languages into MediaWiki pages.
Social Activity Feed
Tool that helps admins and moderators keep an eye on their wiki's social activity.
Tabber
Methods for having "tabbed" content.
TemplateData
Allows editors to specify how templates should be invoked.
Video Embed Tool
Embeds videos from YouTube, Metacafe and many other sites.
### Spam and blocking

ConfirmEdit
Simple captcha implementation.
TitleBlacklist
Regex based tool for blocking disruptive page titles.
### Other tools

ArticleMetaDescription
Adding meta-description tag containing snippet of the Article.
SyntaxHighlight
Code syntax highlighter - supports many languages.
## Available on request

This section was taken from Fandom's Available on request, and may not be current.
This is a non-comprehensive list of MediaWiki extensions that are available upon request to Fandom. See also the Fandom's Extensions enabled on request category.

Achievements
Add badges to users to encourage contributions.
Arrays
Provides parser functions that operate on arrays.
Calendar
Allows for embedding of a calendar into pages.
Community JS
Allows for site JS (not including ImportJS).
DynamicPageList (DPL)
Content listing tool, which adds the `<dpl>` tag.
Editcount
Shows how many edits a particular user has made on the wiki, per namespace.
Gadgets
Creates and allows usage of "gadgets" for users.
Loops
Provides parser functions for performing loops.
Recent Changes Patrol
Allows marking edits as checked and conform to the policies of the wiki.
Variables
Allows you to define a variable on a page then use it later in that same page.
WikiHiero
Syntax to display hieroglyphs.
## Restricted extensions

This section was taken from Fandom's Restricted extensions, and may not be current.
These extensions are subject to access restrictions, and administrators are only given access when there is a clear and current need for them.

AbuseFilter
Tool for automatically catching non-constructive edits.
CheckUser
Grants users with the appropriate permission the ability to check user's IP addresses and other information. (This is generally a staff-only tool, but a few administrators of big wikis also have access to it.)
Nuke
Gives SOAPs, Helpers, Wiki Representatives, and Fandom Staff the ability to mass delete pages. (Wiki admins can also use the nuke script to mass delete pages created by a specific user.)
Protect site
Allows SOAPs, Wiki Representatives, and staff members to temporarily block various site modifications. (This is enabled as deemed needed. Local administrators of a wiki generally do not have access to it.)
SpamBlacklist
Regex-based tool for filtering URL spam.
Semantic MediaWiki
**No longer requestable**. Its "Help" page on this wiki redirects here, but discussion may be best confined to Semantic MediaWiki's official documentation site.
TabView
Gives an easy way of combining pages into one page with a tab for each sub-page.
## External links

* MediaWiki Extensions List at MediaWiki.org, the homepage of the MediaWiki software platform