redis hash to json with awk

hash2json.sh

redis-cli --raw -d "," hgetall mykey | awk -F',' 'BEGIN { print "{" }
  { for (i=1; i < NF; i++) {
      if (i%2) {
        printf "\"%s\"", $i
      } else {
        printf ":%s,\n", $i
      }
    }
  }
  END { printf ":%s\n}", $NF}'

if your values are string, you need to quote them. This is done in the END block of awk and in the else block.