Real free astrology websites don't exist. All free horoscope software and reports are solely designed to increase visitors. Astrology is both a spiritual and psychological subject. The results you get after entering your birth information are merely based on some fundamental information that broadly applies to everyone.
There are many programs and applications that can compute different horoscopes and determine the degrees of planets, but they lack the brain and intuition, therefore their predictions are only dependent on that. You can access your horoscope and forecasts from any app if you're merely curious and would like to do so. I can almost guarantee that you'll be delighted to read them.
If you are looking for accuracy of the free astrology chart generated from website then you will be looking in vain. If you desire precision, it's best to look for a reputable astrologer. Most websites present the identical stuff that they have already stored in their databases. For example, if you are born in New York, your outcomes will be the same as those of others who were born in the same neighborhood, but if you closely examine people who were born in the same city, their lives will be very different. The alignments and connections between everything can only be seen by a skilled astrologer, who will then make a prediction for you.
You can't entirely rely on any website that generates natal charts automatically. Astrology is a study of intuition and spirituality.