Imagina un mundo en el que todo ser humano pueda compartir libremente la suma de todo el conocimiento.
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
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 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.
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.
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
Tweet this
82+ million
media files on Wikimedia Commons
Tweet this
1.8+ billion
unique devices access Wikimedia projects every month
Tweet this
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 conduct our own research and partner with researchers worldwide to address change in society and technology.
More about advocacy
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.
Visit Wikipedia
Wikimedia Commons
The world’s largest free-to-use-library of illustrations, photos, drawings, videos and music.
Visit Wikimedia Commons
News — 最新動態
See what we have been up to
Wikimedia Enterprise announces Google and Internet Archive as its first customers; allows new customers to self sign-up for free trials
June 21, 2022, San Francisco, CA, USA ― Wikimedia Enterprise, a first-of-its-kind commercial product designed for companies that reuse and source Wikipedia and Wikimedia projects at a high volume, today announced its first customers: multinational technology company Google and nonprofit digital library Internet Archive.  Wikimedia Enterprise was recently launched by the Wikimedia Foundation, the nonprofit….
21 June 2022
By Wikimedia Foundation
Read more
Wikimedia Foundation welcomes Selena Deckelmann as Chief Product and Technology Officer
Foundation Technology
13 June 2022, San Francisco  — The Wikimedia Foundation today announced the appointment of Selena Deckelmann as Chief Product and Technology Officer. Selena is currently serving as Senior Vice President of Mozilla, where she was responsible for Firefox. She will officially join on August 1, 2022. Selena will lead the product and technology teams at….
13 June 2022
By Wikimedia Foundation
Read more
Wikimedians are heroes of free knowledge.
Arminé Aghayan
Editor since 2013, Wikimedia community
Vitor Mazuco
Editor since 2009, Wikimedia community
Sam Oyeyele
Editor since 2011, 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 — Verbindung
Stay up-to-date on our work.

Get email updates
Subscribe to news about ongoing projects and initiatives

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.
Photo credits
CC BY-SA 4.0
Selena Deckelmann
Selena Deckelmann
CC BY-SA 4.0
Armine Aghayan
Victor Grigas
CC BY-SA 3.0
Vitor Mazuco
Matthew (WMF)
CC BY-SA 3.0
Sam Oye - Wiki Indaba 2017
Zachary McCune/Wikimedia Foundation
CC BY-SA 4.0
Set Knowledge Free mural illustration
Tomi Um / Wikimedia Foundation
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
Art+Feminism Wikipedia edit-a-thon
Jens Mohr
CC BY-SA 3.0

The Wikimedia Foundation, Inc is a nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual content, and to providing the full content of these wiki-based projects to the public free of charge.
Wikimedia Commons
Wikimedia Chapters
Wikimedia Thematic Organizations
Wikimedia User Groups
Terms of use
Privacy policy
Accessibility statement
Cookie statement
Except where otherwise noted, the content of this site is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported license.
Powered by VIP. Automattic Privacy Notice.
Our WorkSupport WikipediaResearchAdvocacyTechnologyNewsParticipateAbout