Quran is not only famous in the Muslim part of the world but since Islam is the fastest growing religion, the availability of Quran Online gives access to more and more people to read and understand, and thus its fame increases.
“This is no less than a reminder to (all) the worlds. And you shall certainly know the truth of it (all) after a while.” (Quran 38:87-88)
Allah Almighty’s word reaches every human being but they fail to understand, and it is because of the darkness that has prevailed over them. Many people have studied Quran and extracted the knowledge that they always wanted to seek. A few quotes from certain researchers can prove this:
“It (Islam) replaced monkishness by manliness. It gives hope to the slave, brotherhood to mankind, and recognition of the fundamental facts of human nature.” –Canon Taylor, Paper read before the Church Congress at Walverhamton, Oct. 7, 1887; Quoted by Arnoud in THE PREACHING OF ISLAM
“I have always held the religion of Muhammad in high estimation because of its wonderful vitality. It is the only religion which appears to me to possess that assimilating capacity to the changing phase of existence which can make itself appeal to every age.” G.B. Shaw, THE GENUINE ISLAM, Vol. 1, No. 81936.
Quran has amplified and expanded the teachings of the previous heavenly books. The predecessors of Quran have had the same teachings and instructions and they can vouch for what Quran says is true.