This is a list of well-known online encyclopedias that are currently accessible or were formerly accessible on the Internet.
The largest online encyclopedias are general reference works, though there are also many specialized ones. Some online encyclopedias are editions of a print encyclopedia, such as Encyclopædia Britannica, whereas others originated online, such as Wikipedia. Some online encyclopedia use Wikipedia's MediaWiki software or even fork Wikipedia content to create an alternative version.
General reference Name Language Description Status Access Content license Fork of Merged with Wikipedia Various (see list here) General interest, wiki CC BY-SA 4.0, GFDL Nupedia EnglishCombined with GNUpedia Defunct GFDL 1.1 or later Interpedia EnglishGeneral interest, the first site to propose a free encyclopedia written by users Defunct EveripediaEnglishGeneral interest Read-only (archived) CC BY 4.0 Wikipedia CitizendiumEnglishGeneral interest, wiki , copyleft CC BY NC SA 3.0 ConservapediaEnglish American conservative and Christian interests ScholarpediaEnglishArticles are written by scholars and peer-reviewed for accuracy CC BY NC SA 3.0 Encyclopædia Britannica EnglishGeneral interest Limited free access and features, subscription for full access Baidu Baike ChineseCollaborative online encyclopedia hosted by the major Chinese search engine company Baidu Enciklopedio Kalblanda EsperantoGeneral interest. The first online encyclopedia in Esperanto Defunct CC BY SA 3.0, GFDL Esperanto Wikipedia EcuRedSpanishGeneral interest. Cuban Encyclopedia.comEnglishGeneral interest Baike.com ChineseGeneral interest. China's largest wiki GermanGeneral interest Limited free access and features, subscription for full access Columbia EncyclopediaEnglishGeneral interest See word search Crnogorska Enciklopedija MontenegrinGeneral interest (hopes to encourage a Montenegrin language Wikipedia) Defunct Croatian Encyclopedia CroatianGeneral and national encyclopedia Den Store Danske Encyklopædi Danish General interest Digital UniverseEnglishCollection of articles on educational, cultural, and scientific topics Defunct Doosan Encyclopedia KoreanGeneral interest Ekşi Sözlük TurkishGeneral interest Encarta (1993–2009)EnglishGeneral interest Defunct EnciclonetSpanishGeneral interest Limited free access and features, subscription for full access Encyclopædia Britannica 11th Edition (1910–11)EnglishGeneral interest DefunctPublic domain: completely free access from several online sources Encyclopedia of ChinaChineseGeneral interest Subscription Từ điển bách khoa Việt Nam VietnameseGeneral interest. State-sponsored encyclopedia. Encyklopedia Internautica PolishGeneral interest Enciclopedia Libre Universal en Español SpanishFork of the Spanish Wikipedia, using wiki software, released under the GFDL Defunct , copyleft Encyclopædia Universalis FrenchGeneral interest encyclopedia published by Encyclopædia Britannica Subscription Everything2EnglishGeneral interest, users can submit articles on the topic of essentially anything The Free DictionaryEnglish, Spanish, German, French, Italian, Chinese, Portuguese, Dutch, Norwegian, Greek, Arabic, Polish, Turkish, RussianTheFreeDictionary's Encyclopedia draws from various sources, including The Columbia Encyclopedia. GNEEnglishGeneral interest articles are released under a GNU license. Formerly GNUpedia. Defunct Gran Enciclopèdia Catalana CatalanGeneral interest Grand Larousse encyclopédiqueFrenchGeneral interest Great Norwegian Encyclopedia Norwegian (Bokmål)General interest Mix of CC (CC BY SA 3.0, CC BY NC SA 3.0) and limited reuse Great Russian Encyclopedia Russian General interest Great Soviet Encyclopedia Russian, EnglishGeneral interest, often from the former official Soviet viewpoint. Grokipedia EnglishGeneral interest, AI-powered CC BY-SA 4.0 Wikipedia HamichlolHebrew, EnglishGeneral interest, designed for Haredim . Copyleft: mirror of Wikipedia content; copyright: original content. Wikipedia Internetowa encyklopedia PWN PolishGeneral interest Krugosvet (Rus. Кругосвет) RussianGeneral interest. Marathi Vishwakosh MarathiGeneral Interest Marefa ArabicGeneral interest Mawdoo3 ArabicGeneral interest Metapedia Hungarian, German, English, Spanish, Swedish, Romanian, Estonian, French, Slovenian, Czech, Portuguese, Norwegian, Danish, Greek, DutchFar right-wing, white nationalist and neo nazi encyclopedia"Metapedia" als nationales Pendant zu "Wikipedia" (i.e "Metapedia" as a nationalist counterpart to "Wikipedia") from: "Report by the NRW Office for the Protection of the Constitution for the year 2008" by the Ministry of Interior of North Rhine-Westphalia. pp. 59f. Meyers Konversations-Lexikon 4. ed. 1888 - 1892GermanGeneral interest Defunct access from several online sources Namuwiki KoreanGeneral interest CC-BY-NC-SA 2.0 KR Rigveda Wiki Nationalencyklopedin SwedishGeneral interest, comprehensive Subscription New World EncyclopediaEnglishProject of the Unification movement . Wikipedia fork. CC BY SA 3.0, GFDL Wikipedia Oeconomische Encyclopädie (1773-1858)GermanGeneral interestDefunctPublic domain: completely free access from several online sources Oxford Bibliographies OnlineEnglish Proleksis Encyclopedia CroatianGeneral and national encyclopedia with registration RuwikiRussianGeneral interest, forked from Russian Wikipedia during the Russo-Ukrainian war CC BY-SA 4.0Russian Wikipedia Rigveda Wiki Korean General interest CC-BY-NC-SA 2.0 KR Sarvavijnanakosam Malayalam General interest Sogou Baike ChineseCollaborative online encyclopedia hosted by the major Chinese search engine company Sogou Superpedia Indonesian, Sundanese, JavaneseGeneral interest Susning.nu (2001–09) SwedishA Swedish language wiki Defunct Tamil Encyclopedia TamilGeneral Interest TreccaniItalianGeneral interest VeropediaEnglish, Dutch, SpanishMirrors stable versions of selected English Wikipedia articles Defunct Visuotinė lietuvių enciklopedija Lithuanian General interest WIEM Encyklopedia PolishGeneral interest Winkler Prins DutchGeneral interest, three different age levels Subscription World Book EncyclopediaEnglishGeneral interest Subscription KlexikonGermanGeneral interest for children aged six to twelve years CC BY-SA 3.0
Biography Site Language Description AccessAfro-American EncyclopaediaEnglishClassic historical encyclopedia (1895) Australian Dictionary of BiographyEnglishEntries on notable Australians who have died Croatian Biographical LexiconCroatianMulti-volume biographical reference work on notable figures from Croatian history Deutsche BiographieGerman Biographies on notable German speaking people American National BiographyEnglishBiographies of notable AmericansSubscriptionDictionary of Irish ArchitectsEnglishBiographical information on Irish architects from 1720 to 1940 Kdo byl kdoCzechBiographies on notable Czech and Slovak people Österreichisches Biographisches Lexikon 1815–1950German Biographies on notable Austrians Oxford Dictionary of National BiographyEnglishComprehensive 66-volume reference work on notable figures from British history SubscriptionDictionary of New Zealand BiographyEnglish, MāoriEntries on notable New Zealanders who have died Dizionario Biografico degli ItalianiItalian Biographical Dictionary of Italian People, published by the Istituto dell'Enciclopedia Italiana Treccani
Antiquities, arts, and literature Site Language Description AccessDictionary of Art HistoriansEnglishCovers topics relating to art historians, art critics, and their dictionaries Dictionary of Greek and Roman AntiquitiesEnglish Incorporates text from the 19th-century encyclopedia of the same name. Focuses on topics of cultural and historical Greek and Roman significance. Dictionary of Greek and Roman Biography and MythologyEnglishFocuses on topics dealing with Greek and Roman mythology and people Dictionary of Greek and Roman GeographyEnglishFocuses on topics relating to Greek and Roman geography Enciclopedia DantescaItalianDevoted to Dante Alighieri and his time, by the Istituto dell'Enciclopedia Italiana Treccani The Encyclopedia of FantasyEnglishCovers a wide variety of topics in fantasy fiction such as folklore, fairytales, myths, biblical literature, and horror Encyclopedia MythicaEnglishCovers folklore, mythology, and religion."About | Encyclopedia Mythica". pantheon.org. Retrieved 2021-03-01. Harper's Dictionary of Classical Literature and AntiquitiesEnglishCovers subjects of classical antiquity; text from 1898 The History of Nordic Women's LiteratureEnglish, Danish, SwedishSearchable online English-language version including many biographies Kindlers Literatur LexikonGermanOnline-only since 2009, covers works and writers of world literatureSubscriptionThe Literary EncyclopediaEnglishLiterature related articles SubscriptionOxford Art OnlineEnglishVisual art; formerly Grove Art Online and The Dictionary of Art. Originally published in 1996 as a 34-volume printed encyclopedia; offered online since 1998. SubscriptionIn UK, can normally be accessed free via a local librarySIKARTEnglish, German, French, Italian Biographical dictionary and database of Swiss visual art
Regional interest