package main import ( "encoding/json" "fmt" "log" ) var jsonStr = `{ "name": "Jane", "age": 24, "city": "ny" }` func main() { var doc map[string]interface{} err := json.Unmarshal([]byte(jsonStr), &doc) if err != nil { log.Fatalf("json.Unmarshal failed with '%s'\n", err) } fmt.Printf("doc: %#v\n", doc) name, ok := doc["name"].(string) if !ok { log.Fatalf("doc has no key 'name' or its value is not string\n") } fmt.Printf("name: %#v\n", name) }