diff --git a/internal/archiver/batch_test.go b/internal/archiver/batch_test.go
new file mode 100644
index 0000000..982fada
--- /dev/null
+++ b/internal/archiver/batch_test.go
@@ -0,0 +1,294 @@
+package archiver
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"zipprine/internal/models"
+)
+
+func TestBatchCompressSequential(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "zipprine-batch-test-*")
+	if err != nil {
+		t.Fatalf("Failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Create test directories
+	dir1 := filepath.Join(tmpDir, "source1")
+	dir2 := filepath.Join(tmpDir, "source2")
+	os.Mkdir(dir1, 0755)
+	os.Mkdir(dir2, 0755)
+
+	// Create test files
+	os.WriteFile(filepath.Join(dir1, "test1.txt"), []byte("content1"), 0644)
+	os.WriteFile(filepath.Join(dir2, "test2.txt"), []byte("content2"), 0644)
+
+	// Create batch config
+	configs := []*models.CompressConfig{
+		{
+			SourcePath:       dir1,
+			OutputPath:       filepath.Join(tmpDir, "archive1.zip"),
+			ArchiveType:      models.ZIP,
+			CompressionLevel: 5,
+		},
+		{
+			SourcePath:       dir2,
+			OutputPath:       filepath.Join(tmpDir, "archive2.zip"),
+			ArchiveType:      models.ZIP,
+			CompressionLevel: 5,
+		},
+	}
+
+	batchConfig := &BatchCompressConfig{
+		Configs:    configs,
+		Parallel:   false,
+		MaxWorkers: 2,
+	}
+
+	errors := BatchCompress(batchConfig)
+
+	// Check for errors
+	for i, err := range errors {
+		if err != nil {
+			t.Errorf("Batch compress failed for config %d: %v", i, err)
+		}
+	}
+
+	// Verify archives were created
+	if _, err := os.Stat(filepath.Join(tmpDir, "archive1.zip")); os.IsNotExist(err) {
+		t.Error("archive1.zip was not created")
+	}
+	if _, err := os.Stat(filepath.Join(tmpDir, "archive2.zip")); os.IsNotExist(err) {
+		t.Error("archive2.zip was not created")
+	}
+}
+
+func TestBatchCompressParallel(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "zipprine-batch-test-*")
+	if err != nil {
+		t.Fatalf("Failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Create test directories
+	dir1 := filepath.Join(tmpDir, "source1")
+	dir2 := filepath.Join(tmpDir, "source2")
+	dir3 := filepath.Join(tmpDir, "source3")
+	os.Mkdir(dir1, 0755)
+	os.Mkdir(dir2, 0755)
+	os.Mkdir(dir3, 0755)
+
+	// Create test files
+	os.WriteFile(filepath.Join(dir1, "test1.txt"), []byte("content1"), 0644)
+	os.WriteFile(filepath.Join(dir2, "test2.txt"), []byte("content2"), 0644)
+	os.WriteFile(filepath.Join(dir3, "test3.txt"), []byte("content3"), 0644)
+
+	// Create batch config
+	configs := []*models.CompressConfig{
+		{
+			SourcePath:       dir1,
+			OutputPath:       filepath.Join(tmpDir, "archive1.tar.gz"),
+			ArchiveType:      models.TARGZ,
+			CompressionLevel: 5,
+		},
+		{
+			SourcePath:       dir2,
+			OutputPath:       filepath.Join(tmpDir, "archive2.tar.gz"),
+			ArchiveType:      models.TARGZ,
+			CompressionLevel: 5,
+		},
+		{
+			SourcePath:       dir3,
+			OutputPath:       filepath.Join(tmpDir, "archive3.tar.gz"),
+			ArchiveType:      models.TARGZ,
+			CompressionLevel: 5,
+		},
+	}
+
+	batchConfig := &BatchCompressConfig{
+		Configs:    configs,
+		Parallel:   true,
+		MaxWorkers: 2,
+	}
+
+	errors := BatchCompress(batchConfig)
+
+	// Check for errors
+	for i, err := range errors {
+		if err != nil {
+			t.Errorf("Batch compress failed for config %d: %v", i, err)
+		}
+	}
+
+	// Verify archives were created
+	for i := 1; i <= 3; i++ {
+		archivePath := filepath.Join(tmpDir, "archive"+string(rune('0'+i))+".tar.gz")
+		if _, err := os.Stat(archivePath); os.IsNotExist(err) {
+			t.Errorf("archive%d.tar.gz was not created", i)
+		}
+	}
+}
+
+func TestBatchExtract(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "zipprine-batch-test-*")
+	if err != nil {
+		t.Fatalf("Failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Create test archives first
+	dir1 := filepath.Join(tmpDir, "source1")
+	dir2 := filepath.Join(tmpDir, "source2")
+	os.Mkdir(dir1, 0755)
+	os.Mkdir(dir2, 0755)
+
+	os.WriteFile(filepath.Join(dir1, "test1.txt"), []byte("content1"), 0644)
+	os.WriteFile(filepath.Join(dir2, "test2.txt"), []byte("content2"), 0644)
+
+	archive1 := filepath.Join(tmpDir, "archive1.zip")
+	archive2 := filepath.Join(tmpDir, "archive2.zip")
+
+	Compress(&models.CompressConfig{
+		SourcePath:       dir1,
+		OutputPath:       archive1,
+		ArchiveType:      models.ZIP,
+		CompressionLevel: 5,
+	})
+	Compress(&models.CompressConfig{
+		SourcePath:       dir2,
+		OutputPath:       archive2,
+		ArchiveType:      models.ZIP,
+		CompressionLevel: 5,
+	})
+
+	// Now batch extract
+	dest1 := filepath.Join(tmpDir, "dest1")
+	dest2 := filepath.Join(tmpDir, "dest2")
+
+	configs := []*models.ExtractConfig{
+		{
+			ArchivePath:   archive1,
+			DestPath:      dest1,
+			ArchiveType:   models.ZIP,
+			OverwriteAll:  true,
+			PreservePerms: true,
+		},
+		{
+			ArchivePath:   archive2,
+			DestPath:      dest2,
+			ArchiveType:   models.ZIP,
+			OverwriteAll:  true,
+			PreservePerms: true,
+		},
+	}
+
+	batchConfig := &BatchExtractConfig{
+		Configs:    configs,
+		Parallel:   false,
+		MaxWorkers: 2,
+	}
+
+	errors := BatchExtract(batchConfig)
+
+	// Check for errors
+	for i, err := range errors {
+		if err != nil {
+			t.Errorf("Batch extract failed for config %d: %v", i, err)
+		}
+	}
+
+	// Verify files were extracted
+	if _, err := os.Stat(filepath.Join(dest1, "test1.txt")); os.IsNotExist(err) {
+		t.Error("test1.txt was not extracted")
+	}
+	if _, err := os.Stat(filepath.Join(dest2, "test2.txt")); os.IsNotExist(err) {
+		t.Error("test2.txt was not extracted")
+	}
+}
+
+func TestConvertArchive(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "zipprine-convert-test-*")
+	if err != nil {
+		t.Fatalf("Failed to create temp dir: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Create source directory and file
+	sourceDir := filepath.Join(tmpDir, "source")
+	os.Mkdir(sourceDir, 0755)
+	os.WriteFile(filepath.Join(sourceDir, "test.txt"), []byte("test content"), 0644)
+
+	// Create ZIP archive
+	zipPath := filepath.Join(tmpDir, "test.zip")
+	err = Compress(&models.CompressConfig{
+		SourcePath:       sourceDir,
+		OutputPath:       zipPath,
+		ArchiveType:      models.ZIP,
+		CompressionLevel: 5,
+	})
+	if err != nil {
+		t.Fatalf("Failed to create ZIP: %v", err)
+	}
+
+	// Convert to TAR.GZ
+	targzPath := filepath.Join(tmpDir, "test.tar.gz")
+	err = ConvertArchive(zipPath, targzPath, models.ZIP, models.TARGZ)
+	if err != nil {
+		t.Fatalf("Failed to convert archive: %v", err)
+	}
+
+	// Verify TAR.GZ was created
+	if _, err := os.Stat(targzPath); os.IsNotExist(err) {
+		t.Error("Converted archive was not created")
+	}
+
+	// Extract and verify contents
+	destDir := filepath.Join(tmpDir, "dest")
+	err = Extract(&models.ExtractConfig{
+		ArchivePath:   targzPath,
+		DestPath:      destDir,
+		ArchiveType:   models.TARGZ,
+		OverwriteAll:  true,
+		PreservePerms: true,
+	})
+	if err != nil {
+		t.Fatalf("Failed to extract converted archive: %v", err)
+	}
+
+	// Verify file exists
+	if _, err := os.Stat(filepath.Join(destDir, "test.txt")); os.IsNotExist(err) {
+		t.Error("File was not found in converted archive")
+	}
+}
+
+func BenchmarkBatchCompressParallel(b *testing.B) {
+	tmpDir, _ := os.MkdirTemp("", "zipprine-bench-*")
+	defer os.RemoveAll(tmpDir)
+
+	// Create test directories
+	configs := make([]*models.CompressConfig, 4)
+	for i := 0; i < 4; i++ {
+		dir := filepath.Join(tmpDir, "source"+string(rune('0'+i)))
+		os.Mkdir(dir, 0755)
+		os.WriteFile(filepath.Join(dir, "test.txt"), []byte("content"), 0644)
+
+		configs[i] = &models.CompressConfig{
+			SourcePath:       dir,
+			OutputPath:       filepath.Join(tmpDir, "archive"+string(rune('0'+i))+".zip"),
+			ArchiveType:      models.ZIP,
+			CompressionLevel: 5,
+		}
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		batchConfig := &BatchCompressConfig{
+			Configs:    configs,
+			Parallel:   true,
+			MaxWorkers: 2,
+		}
+		BatchCompress(batchConfig)
+	}
+}