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Wikimedia Foundation

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

उस दुनिया की कल्पना करें जिसमें हर एक इंसान स्वतंत्र रूप से सभी ज्ञान के योग में साझा कर सकता है।

Imaginez le monde dans lequel chaque être humain peut partager librement la somme de toutes les connaissances.

تخيل عالما يستطيع فيه كل أنسان ان يشارك بحريه في مجموع المعرفة

Imagine el mundo en el que cada ser humano puede compartir libremente la suma de todo el conocimiento.

Responding to COVID-19

In this time of uncertainty, our enduring commitment is to provide reliable and neutral information for the world.

Learn more

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 Donate now 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.


editors contribute to Wikimedia projects every month

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47+ million

media files on Wikimedia Commons

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1+ billion

unique devices access Wikimedia projects every month

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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

Projects — Projets

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.

NEWS — 新聞 

See what we have been up to

22 May 2020

Wikimedia Foundation Board announces Community Culture Statement, enacts new standards to address harassment and promote inclusivity across projects

Today, the Wikimedia Foundation Board of Trustees voted to ratify new trust and safety standards for Wikipedia and all other Wikimedia projects. The standards, as outlined in a new Community Culture Statement, provide direction and priority to address harassment and incivility within the Wikimedia movement and create welcoming, inclusive, harassment-free spaces in which people can….

Read more 6 March 2020

Amid COVID-19, Wikimedia Foundation offers full pay for reduced hours, mobilizes all staff to work remote, and waives sick time

Update: On March 14, 2020, the Wikimedia Foundation announced new measures to support employees and protect general public health amid COVID-19. As part of these operational actions, we have: Closed both Foundation offices in San Francisco and Washington, DC, until at least March 31, 2020. All staff are now working remotely.  Shifted to a reduced….

Read more

Profiles — 簡介

Wikimedians are heroes of free knowledge.

Vitor Mazuco
Editor since 2009, Wikimedia community
Felix Nartey
Editor since 2012, 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

Help us unlock the world’s knowledge.

As a nonprofit, Wikipedia and our related free knowledge projects are powered primarily through donations.

Donate now

Connect — 連接

Stay up-to-date on our work.

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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

Set Knowledge Free mural

Tomi Um

CC BY-SA 4.0

Lighting through the ages

Maurice Dessertenne

Public domain

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

Wikipedia logo

Nohat; Paullusmagnus; Wikimedia

CC-BY-SA 3.0

Wikimedia Commons logo

Reidab; User:Grunt; 3247

Public domain

ELNÒS, Roncadelle, Italy

Luca Bravo


Another dimension

Rene Böhmer

Unsplash license

Vitor Mazuco

Matthew (WMF)

CC BY-SA 3.0

Felix Nartey

Ruby Mizrahi

CC BY-SA 3.0

Sesame Street Spaghetti Space Chase

Walter Lim from Singapore

CC BY 2.0

Art+Feminism Wikipedia edit-a-thon

Jens Mohr

CC BY-SA 3.0