The nonprofit Wikimedia Foundation provides the essential infrastructure for free knowledge. We host Wikipedia, the free online encyclopedia, created, edited, and verified by volunteers around the world, as well as many other vital community projects. All of which is made possible thanks to donations from individuals like you. We welcome anyone who shares our vision to join us in collecting and sharing knowledge that fully represents human diversity.
Protect and sustain Wikipedia
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Wikimedia projects belong to everyoneYou made it. It is yours to use. For free. That means you can use it, adapt it, or share what you find on Wikimedia sites. Just do not write your own bio, or copy/paste it into your homework.
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Not all wikis are WikimediaThe word “wiki” refers to a website built using collaborative editing software. Projects with no past or existing affiliation with Wikipedia or the Wikimedia Foundation, such as Wikileaks and wikiHow, also use the term. Although these sites also use “wiki” in their name, they have nothing to do with Wikimedia.
270,000+
editors contribute to Wikimedia projects every month
113+ million
media files on Wikimedia Commons and counting
1.6 billion
unique devices access Wikimedia projects every month
ResearchWe conduct our own research and partner with researchers worldwide to address change in society and technology.
More about research TechnologyFrom site reliability to machine learning, our open-source technology makes Wikipedia faster, more reliable, and more accessible worldwide.
More about technology AdvocacyWe fight to protect everyone’s right to access free and open knowledge.
More about advocacy Collaborative projects are the core of the Wikimedia movementOur volunteers build tools, share photos, write articles, and are working to connect all the knowledge that exists.
WikipediaFree encyclopedia written in over 300 languages by volunteers around the world.
Wikimedia CommonsThe world’s largest free-to-use-library of illustrations, photos, drawings, videos and music.
See what we have been up to The Wikipedia TestWe get it; we really do. Lawmakers across the world are rightly focused on regulating powerful, for-profit platforms to mitigate the harms ascribed to social media and other threats online. When developing such legislation, however, some draft laws can inadvertently place public interest projects like Wikipedia at risk. At the Wikimedia Foundation, the nonprofit organization….
Read more Our new AI strategy puts Wikipedia’s humans firstThe Wikimedia Foundation’s new AI strategy doubles down on the volunteers behind Wikipedia.
Read more Wikimedians are heroes of free knowledgeThroughout history, knowledge has been controlled by a powerful few. Wikipedia needs knowledge from all languages and cultures. The internet has become the default for accessing information—women, people of color, and the global south remain underrepresented. We invite you to help correct history.
Help us unlock the world’s knowledge.As a nonprofit, Wikipedia and our related free knowledge projects are powered primarily through donations.
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