diff --git a/src/plugin/validate/main.go b/src/plugin/validate/main.go
index 5b47ddf..1cfafb3 100644
--- a/src/plugin/validate/main.go
+++ b/src/plugin/validate/main.go
@@ -2,7 +2,6 @@ package validate
 
 import (
 	"bufio"
-	"embed"
 	"encoding/csv"
 	"encoding/json"
 	"fmt"
@@ -11,14 +10,12 @@ import (
 	"strings"
 
 	"github.com/realsunyz/geofeed-tools/plugin/color"
+	"github.com/realsunyz/geofeed-tools/plugin/isocode"
 )
 
-//go:embed data/*.json
-var dataFS embed.FS
-
 const (
-	countryFile     = "data/iso3166-1.json"
-	subdivisionFile = "data/iso3166-2.json"
+	countryFile     = "iso3166-1.json"
+	subdivisionFile = "iso3166-2.json"
 )
 
 type Country struct {
@@ -35,7 +32,7 @@ var countries []Country
 var subdivisions SubdivisionMap
 
 func readJSON(filename string, v interface{}) error {
-	data, err := dataFS.ReadFile(filename)
+	data, err := isocode.DataFS.ReadFile(filename)
 	if err != nil {
 		return err
 	}
@@ -151,7 +148,7 @@ func Execute(filePath string) {
 
 	scanner, file, err := readCSV(filePath)
 	if err != nil {
-		fmt.Printf("Failed to %v\n", err)
+		fmt.Printf("Failed to open geofeed file: %v\n", err)
 		return
 	}
 	defer func() {
diff --git a/src/validator.go b/src/validator.go
deleted file mode 100644
index d555d4e..0000000
--- a/src/validator.go
+++ /dev/null
@@ -1,164 +0,0 @@
-// validator.go
-// author: Yanzheng SUN (realSunyz)
-
-package main
-
-import (
-	"bufio"
-	"embed"
-	"encoding/csv"
-	"encoding/json"
-	"fmt"
-	"net"
-	"os"
-	"strings"
-)
-
-const (
-	Reset   = "\033[0m"
-	Red     = "\033[31m"
-	Green   = "\033[32m"
-	Yellow  = "\033[33m"
-	Magenta = "\033[35m"
-	Cyan    = "\033[36m"
-)
-
-type Country struct {
-	Name string `json:"name"`
-	Code string `json:"code"`
-}
-
-type Subdivision struct {
-	Name string `json:"name"`
-	Code string `json:"code"`
-}
-
-type SubdivisionMap map[string][]Subdivision
-
-//go:embed data/*.json
-var dataFS embed.FS
-
-func readJSON(filename string, v interface{}) error {
-	data, err := dataFS.ReadFile(filename)
-	if err != nil {
-		return err
-	}
-	return json.Unmarshal(data, v)
-}
-
-func validateGeofeed(geofeedFile string, countries []Country, subdivisions SubdivisionMap) []string {
-
-	countryMap := make(map[string]bool)
-	for _, country := range countries {
-		countryMap[country.Code] = true
-	}
-
-	file, err := os.Open(geofeedFile)
-	if err != nil {
-		return []string{fmt.Sprintf("Failed to open geofeed file: %v", err)}
-	}
-	defer file.Close()
-
-	scanner := bufio.NewScanner(file)
-	lineNumber := 0
-	var errors []string
-
-	for scanner.Scan() {
-		lineNumber++
-		line := scanner.Text()
-
-		// Skip blank lines
-		if strings.TrimSpace(line) == "" {
-			continue
-		}
-
-		// Skip comment lines
-		if strings.HasPrefix(strings.TrimSpace(line), "#") {
-			continue
-		}
-
-		reader := csv.NewReader(strings.NewReader(line))
-		reader.FieldsPerRecord = -1
-		record, _ := reader.Read()
-
-		// Validate geofeed format (prefix, country_code, subdivision_code, city, postal_code)
-		if len(record) < 5 {
-			errors = append(errors, fmt.Sprintf("Line %d: invalid "+Magenta+"geofeed "+Reset+"format", lineNumber))
-			continue
-		}
-		prefix, countryCode, subdivisionCode := record[0], record[1], record[2]
-
-		// Validate prefix format
-		_, _, prefixErr := net.ParseCIDR(prefix)
-		if prefixErr != nil {
-			errors = append(errors, fmt.Sprintf("Line %d: invalid "+Magenta+"prefix "+Reset+"format ("+Cyan+"%s"+Reset+")", lineNumber, prefix))
-			// continue
-		}
-
-		// Skip empty country code
-		if countryCode == "" {
-			continue
-		}
-
-		// Validate country code
-		if !countryMap[countryCode] {
-			errors = append(errors, fmt.Sprintf("Line %d: invalid "+Magenta+"country code "+Reset+"("+Cyan+"%s"+Reset+")", lineNumber, countryCode))
-			continue
-		}
-
-		// Skip empty subdivision code
-		if subdivisionCode == "" {
-			continue
-		}
-
-		// Validate subdivision code
-		validSubdivision := false
-		for _, subdivision := range subdivisions[countryCode] {
-			if subdivision.Code == subdivisionCode {
-				validSubdivision = true
-				break
-			}
-		}
-		if !validSubdivision {
-			errors = append(errors, fmt.Sprintf("Line %d: invalid "+Magenta+"subdivision code "+Reset+"("+Cyan+"%s"+Reset+") "+"for country ("+Cyan+"%s"+Reset+")", lineNumber, subdivisionCode, countryCode))
-		}
-	}
-
-	return errors
-}
-
-func main() {
-	countryFile := "data/iso3166-1.json"
-	subdivisionFile := "data/iso3166-2.json"
-
-	if len(os.Args) < 2 {
-		fmt.Println("Usage: ./geofeed-validator <path_to_geofeed.csv>")
-		os.Exit(1)
-	}
-
-	geofeedFile := os.Args[1]
-
-	var countries []Country
-	var subdivisions SubdivisionMap
-
-	if err := readJSON(countryFile, &countries); err != nil {
-		fmt.Printf("Failed to load countries: %v\n", err)
-		return
-	}
-
-	if err := readJSON(subdivisionFile, &subdivisions); err != nil {
-		fmt.Printf("Failed to load subdivisions: %v\n", err)
-		return
-	}
-
-	errors := validateGeofeed(geofeedFile, countries, subdivisions)
-
-	if len(errors) == 0 {
-		fmt.Println("Congratulations! Your geofeed file is " + Green + "VALID" + Reset + ".")
-	} else {
-		fmt.Println("Your geofeed file is " + Red + "INVALID" + Reset + ":")
-		for _, err := range errors {
-			fmt.Println("- " + err)
-		}
-	}
-}