The Oldest and Major Upanishads: Isha, Kena, Katha, Chandogya, Brihadaranyaka and More
A beginner-friendly map of the major Upanishads, what they are known for, and how to approach them.
Vedanta
Are the Upanishads Shruti, Smriti, or Vedanta? Simple Terms Explained
The principal Upanishads are Shruti and are also central to Vedanta. They are not Smriti.