New International Version
He came as a witness to testify concerning that light, so that through him all might believe.

American Standard Version
The same came for witness, that he might bear witness of the light, that all might believe through him.

Berean Study Bible
He came as a witness to testify about the Light, so that through him everyone might believe.

Douay-Rheims Bible
This man came for a witness, to give testimony of the light, that all men might believe through him.

English Revised Version
The same came for witness, that he might bear witness of the light, that all might believe through him.

King James Bible
The same came for a witness, to bear witness of the Light, that all men through him might believe.

World English Bible
The same came as a witness, that he might testify about the light, that all might believe through him.

Young's Literal Translation
this one came for testimony, that he might testify about the Light, that all might believe through him;

John 1:7 Additional Translations ...