Semantic MediaWiki is a free, open-source extension for MediaWiki, the wiki platform that powers Wikipedia. It enables users to store structured data within wiki pages and query that information, making content easier to organize, connect, and retrieve. Alongside its family of related extensions, Semantic MediaWiki can transform a wiki into a flexible knowledge-management system. Data created with the software can be exported or published through the Semantic Web, allowing other systems to reuse it.

The project provides resources for users and technical teams, including getting-started guidance, user and administrator manuals, installation and configuration instructions, developer documentation, and information about related extensions. Its community offers ways to seek support, report bugs, contribute, translate content, and follow development updates. The site also features examples of wikis built with Semantic MediaWiki, along with information about conferences, project history, and sponsors. The software is open source, and the site lists version 7.3.1. Organizations and individuals can use the platform to build data-rich wikis suited to their information-management needs.