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Metapedia describes itself as being an alternative to Wikipedia that focuses on culture, art, science, history, politics and philosophy. The site has more than 4,500 articles in English; topics covered include European history and politics. According to Crítica de la Argentina, Metapedia has glowing descriptions of Adolf Hitler and other Nazi figures. The historian Daniel Goldhagen describes it as seeking "to create (currently in 18 languages) an anti-Semitic informational universe." Metapedia calls the Holocaust a genocide only according to "politically correct history" and refers to former U.S. President Barack Obama as a "mixed race former president". Its content has been noted for its neo-Nazi points of view.
The wiki covers a total of 17 languages, with German Metapedia being the most developed.
According to the North Rhine-Westphalian Office for the Protection of the Constitution, Metapedia's articles are characterized by historical negationism and lauding Nazi Germany. For this reason, the German Federal Department for Media Harmful to Young Persons (Bundesprüfstelle für jugendgefährdende Medien) started an indexing process, which would consider as to whether Metapedia is "harmful to young people".
In early 2007, within half a year of the launching of the original Swedish edition, Metapedia received much Swedish media attention for its similarity to Wikipedia (it uses MediaWiki, the same software as Wikipedia and so has a similar visual style) and some of its contents, in particular for its positive characterization of many Nazi German personalities, for cataloguing Jews in Swedish media, and for characterizing Swedish companies as either "Swedish-owned" or "Jewish-owned". This led to an investigation by the Chancellor of Justice (Justitiekanslern) to decide whether the site should be prosecuted for inciting hatred or for violating the Swedish Privacy Law ({{ill|Personuppgiftslagen|sv}}). After reviewing the site's contents, the Chancellor of Justice decided to terminate investigations, since nothing had been found that violated the Freedom of Speech Act ({{ill|Yttrandefrihetsgrundlagen|sv}}) or the Privacy Law. In January 2009, in a response to further attention given to the site, the Swedish Chancellor of Justice opined that Metapedia presented a positive image of Adolf Hitler, but decided not to restart an investigation since this was not illegal.
In a June 2017 article, Alexis Sobel Fitts from Wired noted that the Hungarian and German Metapedia are "especially popular". As of 2022, the Hungarian version is closed.