How do you say this is it in French?

There are a few ways to say "this is it" in French, depending on the context:

Formal:

* C'est tout. (This is all.)

* Voilà. (There you go.)

Informal:

* C'est ça. (This is it.)

* C'est bon. (That's good.)

* C'est fini. (It's finished.)

Other possibilities:

* C'est terminé. (It's over.)

* C'est décidé. (It's decided.)

* C'est comme ça. (That's the way it is.)

The best translation will depend on the specific situation and the speaker's intent.