how to generate schema.ts or schema.json file that matches GraphQLSchema

[taneba]

I wan't to retrieve schema that matches GraphQLSchema type from remote or local schema.graphql file in .ts or .json file.
I couldn't find the way to do this in the docs but does someone know the way to do with graphql-code-generator?

I know it can be done with other tool but I don't want to use multiple tooling for graphql code generation.