In John chapter 1 we learn that Jesus existed in the beginning and he was God. He took part in the creation and everything was made through him.

In John chapter 8 we learn Jesus existed before Abraham lived on earth, and John 17 tells us he was with God before the world was created.

In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made. In him was life, and that life was the light of men. The light shines in the darkness, but the darkness has not understood it.

John 1:1-5 New International Version 1984

In the beginning [before all time] was the Word (Christ), and the Word was with God, and the Word was God Himself. He was present originally with God. All things were made and came into existence through Him; and without Him was not even one thing made that has come into being. In Him was Life, and the Life was the Light of men. And the Light shines on in the darkness, for the darkness has never overpowered it [put it out or absorbed it or appropriated it, and is unreceptive to it].

John 1:1-5 Amplified Bible