Wikimedia Foundation Skip to content Wikimedia Foundation Toggle menu Wikimedia Foundation Current language: en English العربية (العالم) 中文 (繁体中文) Français (France) Русский (Россия) Español (España) Deutsch (Deutschland) Donate now Our Work Support Wikipedia Research Advocacy Technology News Participate About Toggle search Search Celebrate 20 years of Wikipedia and the humans who make it possible → Отметьте 20-летие Википедии и людей, которые сделали её возможной → Célébrez 20 ans de Wikipédia et les personnes qui ont rendu cela possible → احتفل بمرور 20 عامًا على ويكيبيديا وعلى الأشخاص الذين جعلوا وجودها ممكنًا ← Celebra los 20 años de Wikipedia y las personas que lo hacen posible → 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 English · العربية (العالم) · 中文 (繁体中文) · Français (France) · Русский (Россия) · Español (España) · Deutsch (Deutschland) 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 Tweet this 47+ million media files on Wikimedia Commons Tweet this 1+ billion unique devices access Wikimedia projects every month Tweet this 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 — 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 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. NEWS — ACTUALITÉS  See what we have been up to 14 January 2021 Wikipedia celebrates 20 years of free, trusted information for the world 14 January 2021 — Wikipedia, the world’s largest free online encyclopedia, turns 20 years old on 15 January. This birthday commemorates two decades of global efforts to support free knowledge, open collaboration, and trust on the internet. In a time when disinformation and polarization challenge our trust in information and institutions, Wikipedia is more relevant…. Read more 11 January 2021 The infinite potential of human collaboration On November 2, 2000, a space capsule carrying three astronauts arrived at the International Space Station (ISS). It was appropriately named “Expedition 1,” and it was the beginning of 20 years of humans continuously living and working onboard the ISS. Just two months after the landing of Expedition 1, another seemingly impossible human endeavor launched…. Read more 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 — Échanger Stay up-to-date on our work. Get email updates Subscribe to news about ongoing projects and initiatives. Email address Subscribe 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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