How do i say you are fantasic in french?

Here are a few ways to say "you are fantastic" in French, depending on the context and level of formality:

Formal:

* Vous êtes fantastique. (This is the most literal and formal translation.)

* Vous êtes extraordinaire. (This means "you are extraordinary" and is a bit more elevated than "fantastique.")

Informal:

* Tu es fantastique! (This is the casual way to say it to someone you know well.)

* T'es génial(e)! (This is a very common and friendly way to say "you are great.")

* Tu es super! (This means "you are awesome" and is a very informal way to express enthusiasm.)

* Tu es top! (This means "you are top notch" and is a slang expression.)

Other options:

* Vous êtes formidable. (This means "you are formidable" and implies strength and capability.)

* Vous êtes incroyable. (This means "you are incredible" and expresses amazement.)

The best option will depend on the situation and your relationship with the person you are talking to.