How do I say hope you had a nice night in french?

There are a few ways to say "hope you had a nice night" in French, depending on the context and level of formality:

Formal:

* J'espère que vous avez passé une agréable soirée. (I hope you had a pleasant evening.)

* J'espère que vous avez bien dormi. (I hope you slept well.)

Informal:

* J'espère que tu as passé une bonne soirée. (I hope you had a good evening.)

* J'espère que tu as bien dormi. (I hope you slept well.)

* Bonne nuit ! (Good night!)

You can also add a specific detail, like:

* J'espère que le concert était bien. (I hope the concert was good.)

* J'espère que la fête était réussie. (I hope the party was a success.)

The best choice depends on your relationship with the person and the specific situation.