Rest API Rendred field html has confluence styles

I am using Jira Rest API to fetch issue with its description as the rendered field. It is returning content however it includes the styles for table as confluence styles. Becaus of this when this html is used it is having different look and feel than how it is seen in Jira. I tried to check the confleunec style sheet to access directly but then it is difficult to know which styles sheet and with parameters?
How to get fully rendered html so that there is no dependency on confluence styles

In case this is not correct forum suggest correct forum.

Thanks in advance.