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.


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


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

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.


Wikimedians are heroes of free knowledge.

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

KEY INFORMATION — معلومات أساسية

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.


Connect — Échanger

Stay up-to-date about the Wikimedia Foundation

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Subscribe to news about ongoing projects and initiatives.

Contact a human

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

Photo credits

Wikimedian jumping from Wikipedia monument in Dilijan, Armenia


AWang (WMF)

CC-BY-SA 4.0

Wikimedia Conference 2017

Wikimedia Conference 2017

Jason Krüger/Wikimedia Deutschland e.V.

CC BY-SA 4.0

Man in front of computer servers


Victor Grigas

CC BY SA 3.0

Protesters gather on 48th Street in Manhattan to speak against the SOPA and PIPA bills

SOPA protest in Midtown NYC

Zachary McCune

CC BY-SA 4.0

A history of all nations from the earliest times

A history of all nations from the earliest times

Internet Archive Book Images

Public domain

Wikipedia puzzle globe

Wikipedia logo

Nohat; Paullusmagnus; Wikimedia

CC-BY-SA 3.0

Optic projection

Optic Projection fig 89


Public domain

Wikimedia Commons logo

Wikimedia Commons logo - white

Reidab; User:Grunt; 3247

Public domain

May Mohamed Hisham Hashem

May Mohamed Hisham Hashem

Ruby Mizrahi

CC BY-SA 3.0

Photo of Pranayraj Vangari

Pranayraj Vangari

Pranayraj Vangari

CC BY-SA 4.0

Photo of Armine Aghayan

Armine Aghayan

Victor Grigas

CC BY-SA 3.0

Lighting through the ages

Lighting through the ages

Maurice Dessertenne

Public domain