Right-click in the editor or use the command palette
Select "Transform XML using this XSLT"
Choose your input XML file
Enter any required parameter values when prompted
From an XML file:
Open your XML file
Right-click in the editor or use the command palette
Select "Transform XML with XSLT"
Choose your XSLT file
Enter any required parameter values when prompted
The transformed output will be saved as [originalname]_transformed.xml in the same directory as your input XML file and automatically opened in a new editor tab.
Known Issues
Large XML/XSLT files may cause performance issues
Complex XSLT 2.0/3.0 features may not be supported (this uses .NET's XslTransform which is XSLT 1.0)