Formal:
* Está tudo bem? (This is the most common and neutral way to ask if someone is okay.)
* Está tudo em ordem? (This is more formal and means "Is everything in order?")
* Está tudo bem consigo? (This is a more direct way to ask if someone is alright.)
Informal:
* Tudo bem? (This is a more casual way to ask if someone is okay.)
* Tudo certo? (This is a more informal way to ask if everything is alright.)
* Está tudo tranquilo? (This means "Is everything calm?")
To answer "are all right," you can say:
* Sim, estou bem. (Yes, I am fine.)
* Tudo bem. (Everything is okay.)
* Estou bem, obrigado/a. (I am fine, thank you.)
The best way to say "are all right" in Portuguese will depend on the situation. If you are unsure, it is always best to use a formal expression.