I think Report Services Scripter will do what you need. See[urlhttp://www.sqldbatips.com/showarticle.asp?ID=62[/url]
If there are any items in your report that do not have an equivalent in the older version of SQL Server, SSRS Scripter may not help you, but if you have used items common to both versions it should convert OK. However, you should plan to test all reports converted by any automated tool.
Original author: https://github.com/SQL-FineBuild/Common/wiki/ 1-click install and best practice configuration of SQL Server 2019, 2017 2016, 2014, 2012, 2008 R2, 2008 and 2005.
When I give food to the poor they call me a saint. When I ask why they are poor they call me a communist - Archbishop Hélder Câmara