"I make it."
"ez" would be "this". There is no exact translation for "it" in Hungarian, it is usually hidden. In this case, it is hidden in the verb.
When we use verbs in Hungarian, there are two forms based on the fact if there is a definite object or not. This is a complicated topic. For now, the following should be enough:
I make it. = Csinálom. (definite, the object I make is "it")
I make. = Csinálok. (indefinite, I did not specify what I make)
In short, when you use the definite form, it already implies, that there must be an object. If that object is missing from the sentence, the object becomes "it". Other examples:
Látom. - I see it.
Látok. - I see.
Olvasom. - I read it.
Olvasok. - I read.
This is a simplified explanation of this problem and it is far from complete. However, I believe, it is safe to say, if you use it this way, you will be really close to the correct translation.