The present disclosure provides binding proteins, such as antibodies, and binding fragments thereof, that bind beta klotho, including human beta klotho, and exemplary specific sequences of their complementarity determining regions, variable regions, heavy chains, and light chains. The present disclosure also provides method of making the antibody or fragment thereof and methods of their use, including, in activating beta-klotho/FGF receptor complex, inducing FGF19-like and/or FGF21-like signaling, improving glucose and lipid metabolism, and treatment of nonalcoholic steatohepatitis.