Wikimedia Foundation

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Imagine a world in which every single human being can freely share in the sum of all knowledge.

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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.


We conduct our own research and partner with researchers worldwide to address change in society and technology.

More about research


From site reliability to machine learning, our open-source technology makes Wikipedia faster, more reliable, and more accessible worldwide.

More about technology


We fight to protect everyone’s right to access free and open knowledge.

More about advocacy

NEWS —  

See what we have been up to

EU copyright vote leaves the future of online participation uncertain

19 September 2018

The European Parliament’s September 12 vote on the proposed Copyright Directive was a missed opportunity to improve copyright, after many years of discussion: Two years ago, the European Commission set out to modernize copyright laws across the EU with a flawed proposal with potential to improve. This proposal was referred to several committees in the….

Why Wikipedia has an article on Doria Ragland, mother of Meghan Markle

10 September 2018

Last May, Prince Harry, fifth in line to the British throne, married Meghan Markle, an American actress and activist. The event captivated millions upon millions of people for several weeks, and many of them journeyed to Wikipedia to read the encyclopedia’s curated content about the British monarchy, the wedding plans, and the people involved. Unfortunately,….

Projects —

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


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.


Wikimedians are heroes of free knowledge.

Felix Nartey
Editor since 2012, Wikimedia community
Pranayraj Vangari
Editor since 2013, Wikimedia community
Arminé Aghayan
Editor since 2013, 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


editors contribute to Wikimedia projects every month

47+ million

media files on Wikimedia Commons

1+ billion

unique devices access Wikimedia projects every month


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.


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Questions about the Wikimedia Foundation or our projects? Get in touch with our team.



Photo credits


AWang (WMF)

CC-BY-SA 4.0

Wikimedia Conference 2017

Jason Krüger/Wikimedia Deutschland e.V.

CC BY-SA 4.0


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


Public domain

Wikimedia Commons logo - white

Reidab; User:Grunt; 3247

Public domain

Felix Nartey

Ruby Mizrahi

CC SA 3.0

Pranayraj Vangari

Pranayraj Vangari

CC BY-SA 4.0

Armine Aghayan

Victor Grigas

CC BY-SA 3.0

Lighting through the ages

Maurice Dessertenne

Public domain

Art+Feminism Wikipedia edit-a-thon

Jens Mohr

CC BY-SA 3.0