Validate JSON against XML Schema (XSD)

No, XML Schema (XSD) is for validating XML; to validate JSON, see JSON Schema.

I recommend generating schemas by hand for full understanding and full control over the constraints. However, here are some automated tools that can jumpstart the process:

• To convert from JSON Schema to XSD, see jsons2xsd.
• To convert from XSD to JSON Schema, see Jsonix Schema Compiler.

Related and also very useful:

• To parse from XML to JSON (unmarshal) or serialize JSON to XML (marshal), see JSONIX.
• For a list of implementations, including validators in various languages, see JSON-Schema Implementations.

No, the standards are different between the two.

But if you really want to rely on the xsd for validating, Jsonix Schema Compiler can help you generate a JSON Schema to validate your json from your XML Schema.