How do you say i wish all the best in french?

There are a few ways to say "I wish you all the best" in French, depending on the context and formality:

Formal:

* Je vous souhaite tout le meilleur. (This is the most formal option.)

Informal:

* Je te souhaite tout le meilleur. (This is the informal "you" and can be used with friends and family.)

* Bonne chance! (This literally means "good luck" and is a common way to wish someone well.)

* Je te souhaite beaucoup de bonheur. (This means "I wish you a lot of happiness.")

More specific wishes:

* Bonne chance pour ton examen! (Good luck with your exam!)

* Bon courage pour ton projet! (Good luck with your project!)

* Bonne chance pour ton voyage! (Have a good trip!)

The best option depends on your relationship with the person you are speaking to and the situation.