There are presently 5,686 Greek manuscripts in existence today for the New Testament. If we were to compare the number of New Testament manuscripts to other ancient writings, we find that the New Testament manuscripts far outweigh the others in quantity.
The internal consistency of the New Testament documents is about 99.5% textually pure. That is an amazing accuracy. In addition, there are over 19,000 copies in the Syriac, Latin, Coptic, and Aramaic languages. The total supporting New Testament manuscript base is over 24,000.
Almost all biblical scholars agree that the New Testament documents were all written before the close of the First Century. If Jesus was crucified in A.D. 30., then that means the entire New Testament was completed within 70 years. This is important because it means there were plenty of people around when the New Testament documents were penned--people who could have contested the writings. In other words, those who wrote the documents knew that if they were inaccurate, plenty of people would have pointed it out. But, we have absolutely no ancient documents contemporary with the First Century that contest the New Testament texts.
Furthermore, another important aspect of this discussion is the fact that we have a fragment of the gospel of John that dates back to around 29 years from the original writing (John Rylands Papyri A.D. 125). This is extremely close to the original writing date. This is simply unheard of in any other ancient writing, and it demonstrates that the Gospel of John is a First Century document.
The Greek New Testaments below were put together from comparing a large amount of the the above manuscripts.
Interlinear Version.This is from a scanned in book so is a large file and also you will not be able to select text. An interlinear version means that it has the Greek version side by side with a translation in English which is the Authorised version (also known as the King James Version). It also has a literal translation in English next to the Greek word which is very useful for study.
Nestle and Aland This version is not interlinear but has the benefit of being texted based (text can be selected).
Wescott & Hort This version is not interlinear but has the benefit of being texted based (text can be selected).
You may also want to check out this very useful site for the study of New Testament Greek
Berean Interlinear New Testament. Neat study tool this. Has the Greek work followed by the English wors which is a link to the BibleHub website which then has notes on the Greek word.