JSON pretty printer

jsonpp.go

package main

import (
	"bytes"
	"encoding/json"
	"io/ioutil"
	"log"
	"os"
)

func main() {
	src, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		log.Fatal(err.Error())
	}

	var dst bytes.Buffer
	json.Indent(&dst, src, "", "    ")

	os.Stdout.WriteString(dst.String())
}