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Help protect Wikipedia and other public interest projects in the Global Digital Compact.
Sign the open letter now →
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
Donations are secure
1
Wikimedia projects belong to everyone
You 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.
2
We respect your data and privacy
We do not sell your email address or any of your personal information to third parties. More information about our privacy practices are available at the Wikimedia Foundation privacy policy, donor privacy policy, and data retention guidelines.
3
People like you keep Wikipedia accurate
Readers verify the facts. Articles are collaboratively created and edited by a community of volunteers using reliable sources, so no single person or company owns a Wikipedia article. The Wikimedia Foundation does not write or edit, but you and everyone you know can help.
4
Not all wikis are Wikimedia
The 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.
Research
We conduct our own research and partner with researchers worldwide to address change in society and technology.
More about research![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/Wikimedia_Conference_2017_–_228-e1533253661801.jpg?w=600&h=338&crop=1)
Technology
From site reliability to machine learning, our open-source technology makes Wikipedia faster, more reliable, and more accessible worldwide.
More about technology![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/07/Screen-Shot-2018-07-30-at-1.24.58-PM-e1533254033550.png?w=600&h=338&crop=1)
![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/SOPA_protest_in_Midtown_NYC-e1533254825755.jpg?w=600&h=338&crop=1)
Collaborative projects are the core of the Wikimedia movement
Our volunteers build tools, share photos, write articles, and are working to connect all the knowledge that exists.
![Wikipedia puzzle globe](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/08/Wikipedia-logo-e1534036958292.png?w=1024)
Wikipedia
Free encyclopedia written in over 300 languages by volunteers around the world.
![Wikimedia Commons logo](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/05/446px-commons-logo-svg.png?w=446)
Wikimedia Commons
The world’s largest free-to-use-library of illustrations, photos, drawings, videos and music.
See what we have been up to
![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2024/05/Mayree_Clark.jpg?w=643&h=483&crop=1)
The Wikimedia Endowment welcomes Mayree Clark as its newest Board member
The Wikimedia Endowment is delighted to welcome Mayree Clark as a new member of its Endowment Board. Mayree, a finance expert, will bring her extensive governance expertise to the Wikimedia Endowment, a nonprofit charitable organization providing a permanent safekeeping fund to support the Wikimedia projects in perpetuity.
![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2024/04/UN_DigitalCompact_Press_V2_PressRelease_HighRes.png?w=800&h=600&crop=1)
Carta aberta para proteger a Wikipédia e outros projetos de interesse público no Pacto Digital Global
Uma nova carta aberta da Fundação Wikimedia, a organização sem fins lucrativos que opera a Wikipédia e outros projetos Wikimedia, e afiliadas do Movimento Wikimedia ao redor do mundo, apela aos Estados Membros da ONU para protegerem a Wikipédia e outros projetos de interesse público no futuro Pacto Digital Global.
Wikimedians are heroes of free knowledge
![Sesame Street Spaghetti Space Chase](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/1241px-Sesame_Street_Spaghetti_Space_Chase_photo_op-e1532977401471.jpg?w=400&h=300&crop=1)
Christine Meyer
Editor since 2007, Wikimedia community![Vitor Mazuco](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/Vitor_Mazuco-15-e1531350595274.jpg?w=400&h=300&crop=1)
Vitor Mazuco
Editor since 2009, Wikimedia community![Sam Oye - Wiki Indaba 2017](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/02/sam_oye_wiki_indaba_2017_portraits1-e1534046032973.jpg?w=400&h=300&crop=1)
Sam Oyeyele
Editor since 2011, Wikimedia communityThroughout 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.
Donate now![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/ArtAndFeminism_2017_Livrustkammaren_06-e1533254907593.jpg?w=1024)
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Photo credits
![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2024/05/Mayree_Clark.jpg?w=63)
![](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2024/04/UN_DigitalCompact_Press_V2_PressRelease_HighRes.png?w=63)
![Sesame Street Spaghetti Space Chase](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/1241px-Sesame_Street_Spaghetti_Space_Chase_photo_op-e1532977401471.jpg?w=63)
![Vitor Mazuco](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/Vitor_Mazuco-15-e1531350595274.jpg?w=63)
![Sam Oye - Wiki Indaba 2017](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/02/sam_oye_wiki_indaba_2017_portraits1-e1534046032973.jpg?w=63)
Zachary McCune/Wikimedia Foundation
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![Wikimedia Conference 2017](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/06/Wikimedia_Conference_2017_–_228-e1533253661801.jpg?w=63)
Jason Krüger/Wikimedia Deutschland e.V.
![Man in front of computer servers](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/07/Screen-Shot-2018-07-30-at-1.24.58-PM-e1533254033550.png?w=63)
![Wikipedia puzzle globe](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/08/Wikipedia-logo-e1534036958292.png?w=63)
![Wikimedia Commons logo](https://web.archive.org./web/20240522141034im_/https://wikimediafoundation.org/wp-content/uploads/2018/05/446px-commons-logo-svg.png?w=47)