npm install -g dtsgenerator 

$ dtsgen --help Usage: dtsgen [options] <file ... | file patterns using node-glob> Options: -h, --help output usage information -V, --version output the version number -o, --out [file] output d.ts filename 

dtsgen --out types.d.ts schema1.json schema2.json dtsgen --out types.d.ts schema/**/*.schema.json