diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..b4077c4
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module cbr2cbz
+
+go 1.25.3
+
+require github.com/nwaples/rardecode v1.1.3 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..677800e
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/nwaples/rardecode v1.1.3 h1:cWCaZwfM5H7nAD6PyEdcVnczzV8i/JtotnyW/dD9lEc=
+github.com/nwaples/rardecode v1.1.3/go.mod h1:5DzqNKiOdpKKBH87u8VlvAnPZMXcGRhxWkRpHbbfGS0=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..85257ba
--- /dev/null
+++ b/main.go
@@ -0,0 +1,257 @@
+package main
+
+import (
+	"archive/zip"
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/nwaples/rardecode"
+)
+
+type ConversionStats struct {
+	Successful int
+	Skipped    int
+	Failed     int
+	Total      int
+}
+
+func main() {
+	fmt.Println("CBR to CBZ Converter")
+	fmt.Println(strings.Repeat("=", 60))
+
+	// Get current directory
+	currentDir, err := os.Getwd()
+	if err != nil {
+		fmt.Printf("Error getting current directory: %v\n", err)
+		return
+	}
+
+	// Find all .cbr files
+	cbrFiles, err := filepath.Glob(filepath.Join(currentDir, "*.cbr"))
+	if err != nil {
+		fmt.Printf("Error searching for .cbr files: %v\n", err)
+		return
+	}
+
+	if len(cbrFiles) == 0 {
+		fmt.Println("No .cbr files found in current directory.")
+		return
+	}
+
+	fmt.Printf("Found %d CBR file(s) to convert\n", len(cbrFiles))
+	fmt.Println(strings.Repeat("=", 60))
+
+	// Process each file
+	stats := ConversionStats{Total: len(cbrFiles)}
+
+	for _, cbrPath := range cbrFiles {
+		result := convertCBRtoCBZ(cbrPath)
+		switch result {
+		case "success":
+			stats.Successful++
+		case "skipped":
+			stats.Skipped++
+		case "failed":
+			stats.Failed++
+		}
+	}
+
+	// Print summary
+	fmt.Println()
+	fmt.Println(strings.Repeat("=", 60))
+	fmt.Println("Conversion Summary:")
+	fmt.Printf("  ✓ Successful: %d\n", stats.Successful)
+	fmt.Printf("  ⚠ Skipped: %d\n", stats.Skipped)
+	fmt.Printf("  ✗ Failed: %d\n", stats.Failed)
+	fmt.Printf("  Total: %d\n", stats.Total)
+
+	// Ask about deletion
+	if stats.Successful > 0 {
+		fmt.Println()
+		fmt.Println(strings.Repeat("=", 60))
+		fmt.Print("Delete original .cbr files? (yes/no): ")
+
+		reader := bufio.NewReader(os.Stdin)
+		response, _ := reader.ReadString('\n')
+		response = strings.TrimSpace(strings.ToLower(response))
+
+		if response == "yes" || response == "y" {
+			fmt.Println("\nDeleting original files...")
+			for _, cbrPath := range cbrFiles {
+				cbzPath := strings.TrimSuffix(cbrPath, ".cbr") + ".cbz"
+				if _, err := os.Stat(cbzPath); err == nil {
+					if err := os.Remove(cbrPath); err != nil {
+						fmt.Printf("  ✗ Failed to delete %s: %v\n", filepath.Base(cbrPath), err)
+					} else {
+						fmt.Printf("  ✓ Deleted: %s\n", filepath.Base(cbrPath))
+					}
+				}
+			}
+			fmt.Println("\nDone!")
+		} else {
+			fmt.Println("\nOriginal files kept.")
+		}
+	}
+}
+
+func convertCBRtoCBZ(cbrPath string) string {
+	cbzPath := strings.TrimSuffix(cbrPath, ".cbr") + ".cbz"
+	baseName := filepath.Base(cbrPath)
+
+	fmt.Printf("\nProcessing: %s\n", baseName)
+
+	// Check if output file already exists
+	if _, err := os.Stat(cbzPath); err == nil {
+		fmt.Printf("  ⚠ Skipping: %s already exists\n", filepath.Base(cbzPath))
+		return "skipped"
+	}
+
+	// Create temporary directory
+	tempDir, err := os.MkdirTemp("", "cbr2cbz-*")
+	if err != nil {
+		fmt.Printf("  ✗ Error creating temp directory: %v\n", err)
+		return "failed"
+	}
+	defer os.RemoveAll(tempDir)
+
+	// Extract RAR file
+	fmt.Println("  → Extracting...")
+	extractedFiles, err := extractRAR(cbrPath, tempDir)
+	if err != nil {
+		fmt.Printf("  ✗ Error extracting: %v\n", err)
+		return "failed"
+	}
+
+	if len(extractedFiles) == 0 {
+		fmt.Println("  ✗ Error: No files found in archive")
+		return "failed"
+	}
+
+	fmt.Printf("  → Creating CBZ with %d files...\n", len(extractedFiles))
+
+	// Create CBZ file
+	err = createCBZ(cbzPath, tempDir, extractedFiles)
+	if err != nil {
+		fmt.Printf("  ✗ Error creating CBZ: %v\n", err)
+		os.Remove(cbzPath)
+		return "failed"
+	}
+
+	// Get file sizes
+	originalInfo, _ := os.Stat(cbrPath)
+	newInfo, _ := os.Stat(cbzPath)
+
+	originalSize := float64(originalInfo.Size()) / 1024 / 1024
+	newSize := float64(newInfo.Size()) / 1024 / 1024
+	ratio := (1 - float64(newInfo.Size())/float64(originalInfo.Size())) * 100
+
+	fmt.Printf("  ✓ Created: %s\n", filepath.Base(cbzPath))
+	fmt.Printf("    Original: %.2f MB\n", originalSize)
+	fmt.Printf("    New: %.2f MB\n", newSize)
+	fmt.Printf("    Change: %+.1f%%\n", ratio)
+
+	return "success"
+}
+
+func extractRAR(rarPath, destDir string) ([]string, error) {
+	var extractedFiles []string
+
+	// Open RAR file
+	r, err := rardecode.OpenReader(rarPath, "")
+	if err != nil {
+		return nil, err
+	}
+	defer r.Close()
+
+	// Extract each file
+	for {
+		header, err := r.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+
+		// Skip directories and hidden files
+		if header.IsDir || strings.HasPrefix(filepath.Base(header.Name), ".") {
+			continue
+		}
+
+		// Create destination path
+		destPath := filepath.Join(destDir, header.Name)
+
+		// Create directories if needed
+		if err := os.MkdirAll(filepath.Dir(destPath), 0755); err != nil {
+			return nil, err
+		}
+
+		// Create file
+		outFile, err := os.Create(destPath)
+		if err != nil {
+			return nil, err
+		}
+
+		// Copy content
+		_, err = io.Copy(outFile, r)
+		outFile.Close()
+		if err != nil {
+			return nil, err
+		}
+
+		extractedFiles = append(extractedFiles, header.Name)
+	}
+
+	return extractedFiles, nil
+}
+
+func createCBZ(cbzPath, sourceDir string, files []string) error {
+	// Create ZIP file with best compression
+	outFile, err := os.Create(cbzPath)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	zipWriter := zip.NewWriter(outFile)
+	defer zipWriter.Close()
+
+	// Sort files for consistent ordering
+	sort.Strings(files)
+
+	// Add each file to ZIP
+	for _, file := range files {
+		// Create ZIP entry with best compression
+		header := &zip.FileHeader{
+			Name:   file,
+			Method: zip.Deflate,
+		}
+		header.SetMode(0644)
+
+		writer, err := zipWriter.CreateHeader(header)
+		if err != nil {
+			return err
+		}
+
+		// Open source file
+		sourcePath := filepath.Join(sourceDir, file)
+		sourceFile, err := os.Open(sourcePath)
+		if err != nil {
+			return err
+		}
+
+		// Copy to ZIP
+		_, err = io.Copy(writer, sourceFile)
+		sourceFile.Close()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
\ No newline at end of file