Imagine a world in which every single human being can freely share in the sum of all knowledge. Stell dir eine Welt vor, in der jeder einzelne Mensch frei an der Summe allen Wissens teilhaben kann.ResearchTechnologyAdvocacySee what we have been up toWikimedians are heroes of free knowledge.200,000+47+ million1+ billionThings to knowHelp us unlock the world’s knowledge.Stay up-to-date about the Wikimedia FoundationWikimedia projectsMovement affiliates
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CEEMeeting2016_Armenia_Globe_26
Wikimedia Conference 2017
Papaul_Tshibamba-3
SOPA protest in Midtown NYC
A history of all nations from the earliest times
Wikipedia logo
Optic Projection fig 89
Wikimedia Commons logo - white
Emily Temple-Wood at Wikimania 2014
Armine Aghayan
Sesame Street Spaghetti Space Chase
Lighting through the ages
Art+Feminism Wikipedia edit-a-thon Creative Commons Attribution-ShareAlike 3.0 Unported licenseAutomattic Privacy Notice
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Wikimedia Foundation
Imagine a world in which every single human being can freely share in the sum of all knowledge.
Stell dir eine Welt vor, in der jeder einzelne Mensch frei an der Summe allen Wissens teilhaben kann.
The non-profit Wikimedia Foundation provides the essential infrastructure for free knowledge. We host Wikipedia, the free online encyclopedia, created and edited by volunteers around the world, as well as many other vital community projects. We welcome anyone who shares our vision to join us in collecting and sharing knowledge that fully represents human diversity.
Research
We conduct our own research and partner with researchers worldwide to address change in society and technology.
More about research
Technology
From site reliability to machine learning, our open-source technology makes Wikipedia faster, more reliable, and more accessible worldwide.
More about technology
Advocacy
We fight to protect everyone’s right to access free and open knowledge.
More about advocacy
Projects — Proyectos
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.
See all projects
Wikipedia
Free encyclopedia written in 300 languages by volunteers around the world.
Wikimedia Commons
The world's largest free-to-use library of illustrations, photos, drawings, videos and music.
PARTICIPATE — شارك
Wikimedians are heroes of free knowledge.
Emily Temple-Wood
Editor since 2007, Wikimedia community
Arminé Aghayan
Editor since 2013, Wikimedia community
Christine Meyer
Editor since 2007, Wikimedia community
Throughout 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.
Join the movement
200,000+
editors contribute to Wikimedia projects every month
KEY INFORMATION — 關鍵信息
Things to know
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.
We respect your data
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.
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 others can help.
Not all wikis are Wikimedia
The word “wiki” refers to a website built using collaborative editing software. Hundreds of organizations and projects with no affiliation with Wikipedia or the Wikimedia Foundation also use the term, including wikiHow and WikiEducator.
Wikimedia has nothing to do with Wikileaks and never did. Although both use the term “wiki” in their name, they have always been completely separate and unaffiliated.
Help us unlock the world’s knowledge.
As a nonprofit, Wikipedia and our related free knowledge projects are powered primarily through donations.
Donate
Connect — 連接
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Subscribe to news about ongoing projects and initiatives.
This mailing list is powered by MailChimp. The Wikimedia Foundation will handle your personal information in accordance with this site's privacy policy.
Contact a human
Questions about the Wikimedia Foundation or our projects? Get in touch with our team.
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Photo credits
CEEMeeting2016_Armenia_Globe_26
AWang (WMF)
CC-BY-SA 4.0
Wikimedia Conference 2017
Jason Krüger/Wikimedia Deutschland e.V.
CC BY-SA 4.0
Papaul_Tshibamba-3
Victor Grigas
CC BY SA 3.0
SOPA protest in Midtown NYC
Zachary McCune
CC BY-SA 4.0
A history of all nations from the earliest times
Internet Archive Book Images
Public domain
Wikipedia logo
Nohat; Paullusmagnus; Wikimedia
CC-BY-SA 3.0
Optic Projection fig 89
McAllister
Public domain
Wikimedia Commons logo - white
Reidab; User:Grunt; 3247
Public domain
Emily Temple-Wood at Wikimania 2014
Victor Grigas/Wikimedia Foundation
CC BY-SA 3.0
Armine Aghayan
Victor Grigas
CC BY-SA 3.0
Sesame Street Spaghetti Space Chase
Walter Lim from Singapore
CC BY 2.0
Lighting through the ages
Maurice Dessertenne
Public domain
Art+Feminism Wikipedia edit-a-thon
Jens Mohr
CC BY-SA 3.0
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