To add people picker on your upload.aspx or any other sharepoint aspx pages; First create a div[…]

Get All Users List http://your-site-name/_vti_bin/ListData.svc/UserInformationList Get A User By Account or Any Other Property http://your-site-name/_vti_bin/ListData.svc/UserInformationList?$filter=Account eq ‘contoso\administrator’&$select=Id,Name[…]