A questioner asks if they can trust an online Quran? How can they tell if an online Quran is authentic or accurate?
First you need to think of some reputable online sources. One is IslamAwakened where you can find some copies that are authentic and accurate.
We must differentiate between the repute of the translation itself and the other is the website that is presenting this.
Sometimes someone may have the best intention to make a website and put up a translated copy of the Quran but may get the number of the verses wrong or miss a page.
You can also check out Quran Explorer, which has some excellent translations as well.
Dr. Shabir Ally discusses.