SQL Server Data Tools (SSDT) is a toolset which provides an environment for users to carry out database design work in SQL Server. It can be used to build SQL Server relational databases .Is SSDT free?
Yes. It is free. All versions of SSDT are free as I can remember. Quoted: " SQL Server Data Tools (SSDT) is a modern development tool that you can download for free to build SQL Server relational databases, Azure SQL databases, Integration Services packages, Analysis Services data models, and Reporting Services reports.