Axel Stoll (30 October 1948 – 28 July 2014) was an extreme-right esoteric German geophysicist and conspiracy theorist.
He wrote many books, including "Hochtechnologie im Dritten Reich" and "Das Wissen um die unterdrückte Physik - Ein Buch von Axel Stoll", combining pseudo-science and various conspiracy theories, especially concerning the Third Reich.
He received notoriety through the publication of internet videos.
Vice described him as "probably Germany's best known conspiracy theorist".