How do you say too true in french?

There are several ways to say "too true" in French, depending on the context and the level of formality:

Formal:

* C'est bien vrai. (This is very true.)

* C'est tout à fait exact. (This is completely accurate.)

* C'est absolument exact. (This is absolutely exact.)

* Vous avez tout à fait raison. (You are completely right.)

Informal:

* C'est vrai, c'est vrai. (It's true, it's true.)

* Trop vrai ! (Too true!)

* Exactement ! (Exactly!)

* C'est ça ! (That's it!)

* C'est pas faux ! (It's not false!)

More idiomatic:

* Vous avez touché du doigt. (You hit the nail on the head.)

* On ne peut pas dire mieux. (You couldn't say it better.)

The best way to choose the right phrase is to consider the situation and your relationship with the person you are speaking to.