How do you say things are great in french?

Here are a few ways to say "things are great" in French, with varying levels of formality and emphasis:

Formal:

* Tout va très bien. (Everything is going very well.)

* Les choses vont très bien. (Things are going very well.)

Informal:

* Tout roule ! (Everything is rolling!)

* Ça roule ! (It's rolling!)

* C'est top ! (It's great!)

* Super ! (Great!)

* Génial ! (Awesome!)

* Nickel ! (Perfect!)

To express a more personal feeling of happiness:

* Je suis ravi/e ! (I am delighted!)

* Je suis content/e ! (I am happy!)

* Je suis heureux/heureuse ! (I am happy!)

The best choice will depend on the context and who you are talking to.