Hi arulbrettokumarabraham-6736,
Are you talking about Client side People Picker control? If so, you can add it like below:
- Create a wiki page
- Add a content editor web part
- insert the code into this web part
Test :
More references:
- https://social.technet.microsoft.com/wiki/contents/articles/37728.sharepoint-online-step-by-step-client-side-people-picker-control.aspx
- peoplepicker.html
Best Regards,
Baker Kong