You can say "isso é bonito" in Portuguese to mean "that is beautiful."
beautiful
you are stunning
Lindo\linda.
In Brazilian portuguese, girls and women say : "Olá lindão" (leendawn)
You could say "Você é linda" in Portuguese, which means "You are beautiful."
pássaro, passarinho, ave.
Pássaro brincalhão
Boa noite, linda (for female beautiful)
You can say "Que bela imagem" in Portuguese to express that a picture is nice or beautiful.
coisa linda
vida bela