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.

200,000+

editors contribute to Wikimedia projects every month

47+ million

media files on Wikimedia Commons

1+ billion

unique devices access Wikimedia projects every month

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 — 項目

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

Profiles — الصفحة الشخصية

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

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

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Contact a human

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

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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

Papaul_Tshibamba-3

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

The Municipal Library Patiala

Rupika Sharma/Wikilover90

CC BY-SA 4.0

WmCon2018 LearningDays 26

Alexandra Wang/Wikimedia Foundation

CC BY-SA 4.0

May Mohamed Hisham Hashem

Ruby Mizrahi

CC BY-SA 3.0

Pranayraj Vangari

Pranayraj Vangari

CC BY-SA 4.0

Sesame Street Spaghetti Space Chase

Walter Lim from Singapore

CC BY 2.0