If you are speaking to a man then it would be:
You are beautiful (to a stranger) - Vous êtes beau
You are beautiful (to a friend) - Tu es beau
If you are speaking to a woman then it would be:
You are beautiful (to a stranger) - Vous êtes belle
You are beautiful (to a friend) - Tu es belle
If you want to emphasise it then you can also use the word très (very) before the words belle and beau.
Je suis beau
However "beau" is the masculine form of the adjective, so "Je suis beau" would translate "I am handsome." A related form is "Il est beau gosse," which means "He is a handsome man," where "gosse," which literally translates as "child" takes the more figurative meaning of "man."
To say that a woman is pretty or beautiful, one could use the feminine form of "beau" and say, "Elle est belle" or "Elle est charmante," where "charmante," which literally translates as "charming" takes the more figurative meaning of "alluring" or "beautiful."
Tu es belle is a French equivalent of 'You're beautiful'. The subject pronoun 'tu' means 'you'. The verb 'es'means '[you] are'. The feminine adjective 'belle' means 'beautiful'. All together, the words are pronounced 'tyoo eh treh behl'. The form for a 'beautiful' or 'handsome' male is 'beau', which is pronounced 'boh'.
That's what's said to an individual who's part of the speaker's close circle of family, friends, and peers. Otherwise, it's 'Vous êtes belle'. This phrase uses the formal 'you are' ['vous êtes'] form. It's pronounced 'voo-seht behl'. Once again, the form for a 'beautiful' or 'handsome' male is 'beau'.
Translation: vous êtes beau(x)
Vous êtes une belle femme
You say, belle cousine.
Reste belle is how you say stay beautiful in French. You can also say: "garde ta beauté, garde ta fraîcheur which also means stay beautiful.
belle âme
"belle maison"
beau desastre
Beautiful skin in French is "Belle Peau" :)
"Belle femme" is "beautiful woman" in French.
Belle famille is beautiful family in French.
'Beautiful view' translates to French as 'belle vue'.
Belles personnes is "beautiful people" in French.
Beautiful photographs in french is de belles photos
Beautiful all over in French is belle partout.
Beau Rêve = Beautiful Dream
You say, belle cousine.
cloche
belle
Beautiful Goddess in French is Belle Déesse and is pronounced (Bell dee-eh)