With what tools to create and/or validate XML, having a bunch of XSD files?

Question

XSD

Actually, there are several dozen XSD files located locally on the disk.
All files refer to each other by URLs that cannot be opened (at least I do not have access to them), but I have all these files locally.

Actually it is necessary:
​​1. Somehow to make XML corresponding to these XSD, and at the same time to remain mentally healthy. It is desirable for some reasonable time, because manually searching with a notepad for each complex type (which, as a rule, consists of a bunch of other complex types) is PPC.
2. Check some XML for compliance with these XSDs.

Are there any (preferably free) programs and / or plugins for Notepad ++, Eclipse, Idea, VS Code or something else for this?

Answer 1

Altova is a type of visual trial.
Microsoft has a bunch of validators in the sdk
You can write your own console Toulouse to check the validity