How accurate is the online typesetting tool?

I am also a constellation lover. I have used the online typesetting tools of many websites. For most people's birth time, the typesetting system on the website can arrange the correct constellation. However, some websites obviously arrange the birth time just on the first day of the lunar new year, and some of them have the wrong moon columns. Constellations born in spring sometimes list the years wrong. The reason for the error may be that there is something wrong with the computer program. As for which websites are more credible, I came across a website called Cindali numerology prediction tool network this year. After a period of use, no typos have been found so far.