diff --git a/cmd/conv/default.json b/cmd/conv/default.json
new file mode 100644
index 0000000..3ee9615
--- /dev/null
+++ b/cmd/conv/default.json
@@ -0,0 +1,198 @@
+{
+    "title": "Good Balance Calculator",
+    "version": "5.04",
+    "values": [
+      {
+        "sheet": 2,
+        "cell": "C7",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "TotalPurchaseFromSuppliers",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C27",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "TotalStaffCosts",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C18",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "Profit",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C19",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "FinancialCosts",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C20",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "IncomeFromFinancialInvestments",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C22",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "AdditionsToFixedAssets",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C37",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "Turnover",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C21",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "TotalAssets",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C23",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "FinancialAssetsAndCashBalance",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C26",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "NumberOfEmployees",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C24",
+        "type": "bool",
+        "struct": "CompanyFacts",
+        "field": "HasCanteen",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C38",
+        "type": "bool",
+        "struct": "CompanyFacts",
+        "field": "IsB2B",
+        "default": ""
+      },
+      {
+        "sheet": 2,
+        "cell": "C33",
+        "type": "int",
+        "struct": "CompanyFacts",
+        "field": "AverageJourneyToWorkForStaffInKm",
+        "default": ""
+      }
+    ],
+    "areas": [
+      {
+        "sheet": 2,
+        "start_row": 10,
+        "end_row": 14,
+        "struct": "SupplyFraction",
+        "cols": [
+          {
+            "col": "B",
+            "field": "IndustryCode",
+            "type": "string",
+            "default": ""
+          },
+          {
+            "col": "D",
+            "field": "CountryCode",
+            "type": "string",
+            "default": ""
+          },
+          {
+            "col": "E",
+            "field": "Costs",
+            "type": "string",
+            "default": ""
+          }
+        ]
+      },
+      {
+        "sheet": 2,
+        "start_row": 30,
+        "end_row": 32,
+        "struct": "EmployeesFraction",
+        "cols": [
+          {
+            "col": "B",
+            "field": "CountryCode",
+            "type": "string",
+            "default": ""
+          },
+          {
+            "col": "D",
+            "field": "Percentage",
+            "type": "float32",
+            "default": ""
+          }
+        ]
+      },
+      {
+        "sheet": 2,
+        "start_row": 41,
+        "end_row": 43,
+        "struct": "IndustrySector",
+        "cols": [
+            {
+              "col": "B",
+              "field": "IndustryCode",
+              "type": "string",
+              "default": ""
+            },
+            {
+              "col": "C",
+              "field": "Description",
+              "type": "string",
+              "default": ""
+            },
+            {
+              "col": "D",
+              "field": "AmountOfTotalTurnover",
+              "type": "int",
+              "default": ""
+            }
+          ]
+      }
+    ],
+    "rating": {
+        "sheet": 3,
+        "start_row": 9,
+        "end_row": 93,
+        "points_col": "I",
+        "max_points_col": "J",
+        "id_col": "",
+        "short_name_col": "B",
+        "name_col": "C",
+        "estimations_col": "H",
+        "weight_col": "D",
+        "selected_by_user_col": "N"
+      }
+  }
+  
\ No newline at end of file
diff --git a/cmd/conv/main.go b/cmd/conv/main.go
new file mode 100644
index 0000000..063baed
--- /dev/null
+++ b/cmd/conv/main.go
@@ -0,0 +1,56 @@
+package main
+
+import (
+	"bytes"
+	_ "embed"
+	"fmt"
+	"log"
+	"strconv"
+
+	"git.ecogood.org/andreas.schroepfer/excelConverter/pkg/ecalc"
+	"git.ecogood.org/andreas.schroepfer/excelConverter/pkg/loader"
+	"git.ecogood.org/andreas.schroepfer/excelConverter/pkg/set"
+	excelize "github.com/360EntSecGroup-Skylar/excelize/v2"
+)
+
+//go:embed default.json
+var defaultConf []byte
+
+func main() {
+	buf := bytes.NewBuffer(defaultConf)
+	conf := &loader.Conf{}
+	err := conf.DecodeJSON(buf)
+	//fmt.Println(err, conf)
+
+	eBalance := ecalc.Ecalc{
+		CompanyFacts: ecalc.CompanyFacts{},
+	}
+	xFile, err := excelize.OpenFile("../../test/gwb-rechner_5_0_4_vollbilanz.xlsx")
+	fmt.Println("openFile err :", err)
+	//sheets := make(map[int])
+	for _, v := range conf.Values {
+		cellValue, err := xFile.GetCellValue(
+			xFile.GetSheetName(v.Sheet),
+			v.Cell,
+		)
+		if err != nil {
+			log.Println("error", err)
+		}
+		var inValue interface{}
+		switch v.Struct {
+		case "CompanyFacts":
+			switch v.Type {
+			case "int":
+				inValue, err = strconv.Atoi(cellValue)
+				if err != nil {
+					fmt.Println(xFile.GetSheetName(v.Sheet))
+					fmt.Println("err ATOI", err)
+				}
+			default:
+				inValue = cellValue
+			}
+			set.Field(&eBalance.CompanyFacts, v.Field, inValue)
+		}
+	}
+	fmt.Printf("%#v", eBalance)
+}
diff --git a/pkg/loader/conf.go b/pkg/loader/conf.go
index e39cf1c..33092b9 100644
--- a/pkg/loader/conf.go
+++ b/pkg/loader/conf.go
@@ -68,3 +68,10 @@ func (c Conf) EncodeJSON(w io.Writer) error {
 	enc.SetIndent("", "  ")
 	return enc.Encode(c)
 }
+
+// DecodeJSON writes the configuration from the reader into
+// the pointer of the conf
+func (c *Conf) DecodeJSON(r io.Reader) error {
+	dec := json.NewDecoder(r)
+	return dec.Decode(c)
+}
diff --git a/test/gwb-rechner_5_0_4_vollbilanz.xlsx b/test/gwb-rechner_5_0_4_vollbilanz.xlsx
index e3431bf..beb35dd 100644
Binary files a/test/gwb-rechner_5_0_4_vollbilanz.xlsx and b/test/gwb-rechner_5_0_4_vollbilanz.xlsx differ