Being convinced that complete victory over their enemies is essential to defend life, liberty, independence and religious freedom, and to preserve human rights and justice in their own lands as well as in other lands, and that they are now engaged in a common struggle against savage and brutal forces seeking to subjugate the world...

https://en.wikipedia.org/wiki/Declaration_by_United_Nations

The Declaration does not name Nazism or Fascism specifically, but does describe the characteristics common to them and other authoritarian and aggressive forms of government.