Hi Bruno,
Thanks for contacting Syncfusion support.
We can achieve your requirement by using Web based ReportDesigner and currently, we don’t have ReportDesigner application in web platform. We have already logged feature report for “Provide ReportDesigner control in web Platform”. This feature will be available in our Volume 4, 2017 Essential studio build release which is tentatively scheduled to be released in the month of October,2017.
Regards,
Yuvaraj D.