Archive of Our Own (often shortened to AO3) is a nonprofit open source repository for fanfiction and other fanworks contributed by users. The site was created in 2008 by the Organization for Transformative Works and went into open beta in 2009. As of 28 November 2022, Archive of Our Own hosts 10,220,000 works in over 54,020 fandoms. The site has received positive reception for its curation, organization and design, mostly done by readers and writers of fanfiction.
Archive of Our Own uses Georgia for headers and the site logo, Monaco for publication timestamps (on machines where Monaco isn’t available: Consolas), and Lucida Sans for body text and buttons. The site also allows users to apply their own custom skins to the site itself and to individual works, allowing for the usage of different fonts on specific works.