diff --git a/.gitignore b/.gitignore
index 36b13f1..8b87ad3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+backup/
+
 # ---> Python
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/core/backup.py b/core/backup.py
new file mode 100644
index 0000000..d078788
--- /dev/null
+++ b/core/backup.py
@@ -0,0 +1,15 @@
+# core/backup.py
+
+import os
+import shutil
+from core.paths import get_project_root
+
+def move_to_backup(path):
+    """Mueve un archivo al directorio centralizado /backup."""
+    root = get_project_root()
+    backup_dir = os.path.join(root, "backup")
+    os.makedirs(backup_dir, exist_ok=True)
+
+    target = os.path.join(backup_dir, os.path.basename(path))
+    shutil.move(path, target)
+    return target
diff --git a/core/paths.py b/core/paths.py
new file mode 100644
index 0000000..ae2a3d8
--- /dev/null
+++ b/core/paths.py
@@ -0,0 +1,7 @@
+# core/paths.py
+
+import os
+
+def get_project_root():
+    """Devuelve la ruta donde está main.py."""
+    return os.path.dirname(os.path.abspath(__file__ + "/.."))
diff --git a/main.py b/main.py
index 31dbd90..ba8cf97 100644
--- a/main.py
+++ b/main.py
@@ -9,54 +9,15 @@ from processors.standardizer import standardize_comic
 
 
 def parse_args():
-    parser = argparse.ArgumentParser(
-        description="Gestor de colección de cómics CBR/CBZ"
-    )
+    parser = argparse.ArgumentParser(description="Gestor de cómics CBR/CBZ")
 
-    parser.add_argument(
-        "--ruta",
-        type=str,
-        required=True,
-        help="Ruta base donde buscar los cómics"
-    )
-
-    parser.add_argument(
-        "--listar",
-        action="store_true",
-        help="Listar todos los archivos CBR/CBZ encontrados"
-    )
-
-    parser.add_argument(
-        "--validar",
-        action="store_true",
-        help="Validar los archivos encontrados"
-    )
-
-    parser.add_argument(
-        "--limpiar",
-        action="store_true",
-        help="Eliminar archivos basura y reconstruir CBZ limpios"
-    )
-
-    parser.add_argument(
-        "--convertir",
-        action="store_true",
-        help="Convertir los archivos al formato indicado con --formato"
-    )
-
-    parser.add_argument(
-        "--formato",
-        type=str,
-        choices=["cbz", "cbr"],
-        default="cbz",
-        help="Formato final deseado (por defecto: cbz)"
-    )
-
-    parser.add_argument(
-        "--estandarizar",
-        action="store_true",
-        help="Pipeline completo: limpiar, convertir y normalizar"
-    )
+    parser.add_argument("--ruta", required=True)
+    parser.add_argument("--listar", action="store_true")
+    parser.add_argument("--validar", action="store_true")
+    parser.add_argument("--limpiar", action="store_true")
+    parser.add_argument("--convertir", action="store_true")
+    parser.add_argument("--estandarizar", action="store_true")
+    parser.add_argument("--formato", choices=["cbz", "cbr"], default="cbz")
 
     return parser.parse_args()
 
@@ -64,74 +25,38 @@ def parse_args():
 def main():
     args = parse_args()
 
-    print(f"Buscando archivos CBR/CBZ en: {args.ruta}\n")
     comic_files = find_comic_files(args.ruta)
 
-    if not comic_files:
-        print("No se encontraron archivos .cbr o .cbz")
-        return
-
-    # ------------------------------------------------------------
-    # LISTAR
-    # ------------------------------------------------------------
     if args.listar:
-        print("Archivos encontrados:")
         for f in comic_files:
-            print(f" - {f}")
-        print()
+            print(f)
 
-    # ------------------------------------------------------------
-    # VALIDAR
-    # ------------------------------------------------------------
     if args.validar:
-        print("Validando archivos...\n")
         for f in comic_files:
-            result = validate_comic(f)
-            print(result)
-
-            if result.errors:
-                print("  Errores:")
-                for e in result.errors:
-                    print(f"    - {e}")
-
-            if result.warnings:
-                print("  Avisos:")
-                for w in result.warnings:
-                    print(f"    - {w}")
-
+            print(f"Validando: {f}")
+            print(validate_comic(f))
             print()
 
-    # ------------------------------------------------------------
-    # LIMPIAR
-    # ------------------------------------------------------------
     if args.limpiar:
-        print("Limpiando archivos...\n")
         for f in comic_files:
-            result = clean_comic(f)
-            print(result)
+            print(f"Limpieza: {f}")
+            print(clean_comic(f))
             print()
 
-    # ------------------------------------------------------------
-    # CONVERTIR
-    # ------------------------------------------------------------
     if args.convertir:
-        print(f"Convirtiendo archivos al formato {args.formato}...\n")
         for f in comic_files:
+            print(f"Convirtiendo: {f}")
             info = convert_comic(f, args.formato)
             if info["needs_conversion"]:
-                print(f"Convertido: {f} → {info['target_path']}")
+                print(f"  → Convertido a {args.formato.upper()}: {info['target_path']}")
             else:
-                print(f"Sin cambios: {f}")
-        print()
+                print(f"  → Sin cambios (ya era {args.formato.upper()})")
+            print()
 
-    # ------------------------------------------------------------
-    # ESTANDARIZAR
-    # ------------------------------------------------------------
     if args.estandarizar:
-        print("Estandarizando archivos...\n")
         for f in comic_files:
-            result = standardize_comic(f, args.formato)
-            print(result)
+            print(f"Estandarizando: {f}")
+            print(standardize_comic(f, args.formato))
             print()
 
 
diff --git a/processors/cleaner.py b/processors/cleaner.py
index bb4d01e..f8721b5 100644
--- a/processors/cleaner.py
+++ b/processors/cleaner.py
@@ -7,7 +7,7 @@ import tempfile
 import shutil
 
 from core.constants import TRASH_FILES
-from processors.validator import try_open_rar, try_open_zip
+from processors.validator import validate_comic
 
 
 class CleanResult:
@@ -16,116 +16,48 @@ class CleanResult:
         self.cleaned_path = None
         self.removed_files = []
         self.repacked = False
-        self.converted_to_cbz = False
-
-    def pretty_removed_files(self):
-        if not self.removed_files:
-            return "  No se eliminaron archivos\n"
-        msg = f"  Archivos eliminados ({len(self.removed_files)}):\n"
-        for f in self.removed_files:
-            msg += f"    - {f}\n"
-        return msg
 
     def __str__(self):
         msg = f"Limpieza de: {self.original_path}\n"
-        msg += self.pretty_removed_files()
-        if self.repacked:
-            msg += "  Archivo reconstruido\n"
-        if self.converted_to_cbz:
-            msg += "  Convertido a CBZ\n"
-        msg += f"  Resultado final: {self.cleaned_path}"
+        msg += f"  Archivos eliminados: {len(self.removed_files)}\n"
+        msg += f"  Resultado final: {self.cleaned_path}\n"
         return msg
 
 
-# ------------------------------------------------------------
-# 1) Limpieza de una carpeta ya extraída
-# ------------------------------------------------------------
+def clean_comic(path):
+    validation = validate_comic(path)
 
-def clean_folder(folder_path):
-    """
-    Elimina archivos basura dentro de una carpeta ya extraída.
-    Devuelve una lista con las rutas relativas de los archivos eliminados.
-    """
-    removed = []
+    if validation.errors:
+        raise Exception(f"Archivo corrupto: {path}")
 
-    for root, _, files in os.walk(folder_path):
-        for f in files:
-            if f.lower() in TRASH_FILES:
-                full = os.path.join(root, f)
-                rel = os.path.relpath(full, folder_path)
-                os.remove(full)
-                removed.append(rel)
+    real = validation.real_format
 
-    return removed
+    # Abrir según formato real
+    archive = zipfile.ZipFile(path, "r") if real == "zip" else rarfile.RarFile(path, "r")
 
-
-# ------------------------------------------------------------
-# 2) Limpieza de un archivo completo (modo actual)
-# ------------------------------------------------------------
-
-def clean_comic(path, output_path=None):
-    """
-    Limpia un archivo CBR/CBZ:
-    - elimina basura
-    - convierte CBR → CBZ
-    - reconstruye solo si es necesario
-    """
-    result = CleanResult(path)
-    ext = os.path.splitext(path)[1].lower()
-
-    # 1) Abrir archivo
-    if ext == ".cbr":
-        archive = try_open_rar(path)
-        if archive:
-            real_format = "rar"
-        else:
-            archive = try_open_zip(path)
-            if archive:
-                real_format = "zip"
-            else:
-                raise Exception(f"No se puede abrir {path}")
-
-    elif ext == ".cbz":
-        archive = try_open_zip(path)
-        if archive:
-            real_format = "zip"
-        else:
-            raise Exception(f"No se puede abrir {path}")
-
-    # 2) Extraer a carpeta temporal
     temp_dir = tempfile.mkdtemp()
     archive.extractall(temp_dir)
     archive.close()
 
-    # 3) Limpiar carpeta
-    removed = clean_folder(temp_dir)
-    result.removed_files = removed
+    removed = []
+    for root, _, files in os.walk(temp_dir):
+        for f in files:
+            if f.lower() in TRASH_FILES:
+                full = os.path.join(root, f)
+                os.remove(full)
+                removed.append(os.path.relpath(full, temp_dir))
 
-    # 4) Determinar si hay que reconstruir
-    changes_needed = False
-
-    if removed:
-        changes_needed = True
-
-    if ext == ".cbr":
-        changes_needed = True
-        result.converted_to_cbz = True
-
-    if not changes_needed:
-        result.cleaned_path = path
+    # Si no se eliminó nada → no reconstruir
+    if not removed:
         shutil.rmtree(temp_dir)
+        result = CleanResult(path)
+        result.cleaned_path = path
         return result
 
-    # 5) Ruta final
-    if output_path:
-        final_path = output_path
-    else:
-        base, _ = os.path.splitext(path)
-        final_path = base + ".cbz"
+    # Reconstruir como CBZ
+    base, _ = os.path.splitext(path)
+    final_path = base + ".cbz"
 
-    result.cleaned_path = final_path
-
-    # 6) Reempaquetar como CBZ
     with zipfile.ZipFile(final_path, "w", zipfile.ZIP_DEFLATED) as new_zip:
         for root, _, files in os.walk(temp_dir):
             for f in files:
@@ -133,7 +65,14 @@ def clean_comic(path, output_path=None):
                 rel = os.path.relpath(full, temp_dir)
                 new_zip.write(full, rel)
 
-    result.repacked = True
-
     shutil.rmtree(temp_dir)
+
+    # Mover original a backup
+    from core.backup import move_to_backup
+    move_to_backup(path)
+
+    result = CleanResult(path)
+    result.cleaned_path = final_path
+    result.removed_files = removed
+    result.repacked = True
     return result
diff --git a/processors/converter.py b/processors/converter.py
index 3398d6d..79473f1 100644
--- a/processors/converter.py
+++ b/processors/converter.py
@@ -6,53 +6,33 @@ import rarfile
 import tempfile
 import shutil
 
-
-def decide_target_format(original_path, desired_format="cbz"):
-    """
-    Decide si el archivo debe convertirse y cuál será su ruta final.
-    No realiza la conversión.
-    """
-    base, _ = os.path.splitext(original_path)
-    target_path = f"{base}.{desired_format.lower()}"
-
-    needs_conversion = not original_path.lower().endswith(desired_format.lower())
-
-    return {
-        "needs_conversion": needs_conversion,
-        "target_format": desired_format.lower(),
-        "target_path": target_path
-    }
+from processors.validator import validate_comic
 
 
 def convert_comic(path, desired_format="cbz"):
-    """
-    Convierte un archivo CBR/CBZ al formato deseado.
-    NO limpia basura.
-    NO renombra páginas.
-    NO reordena nada.
-    """
-    info = decide_target_format(path, desired_format)
+    validation = validate_comic(path)
 
-    if not info["needs_conversion"]:
-        return info  # Nada que hacer
+    if validation.errors:
+        raise Exception(f"Archivo corrupto: {path}")
 
-    ext = os.path.splitext(path)[1].lower()
+    real = validation.real_format
 
-    # 1) Abrir archivo original
-    if ext == ".cbr":
-        archive = rarfile.RarFile(path, "r")
-    elif ext == ".cbz":
-        archive = zipfile.ZipFile(path, "r")
-    else:
-        raise Exception("Formato no soportado")
+    # Si ya está en el formato deseado → nada que hacer
+    if desired_format == "cbz" and real == "zip":
+        return {"needs_conversion": False, "target_path": path}
+
+    if desired_format == "cbr" and real == "rar":
+        return {"needs_conversion": False, "target_path": path}
+
+    # Abrir según formato real
+    archive = zipfile.ZipFile(path, "r") if real == "zip" else rarfile.RarFile(path, "r")
 
-    # 2) Extraer a carpeta temporal
     temp_dir = tempfile.mkdtemp()
     archive.extractall(temp_dir)
     archive.close()
 
-    # 3) Reempaquetar en el formato deseado
-    target_path = info["target_path"]
+    base, _ = os.path.splitext(path)
+    target_path = f"{base}.{desired_format}"
 
     if desired_format == "cbz":
         with zipfile.ZipFile(target_path, "w", zipfile.ZIP_DEFLATED) as new_zip:
@@ -63,10 +43,12 @@ def convert_comic(path, desired_format="cbz"):
                     new_zip.write(full, rel)
 
     elif desired_format == "cbr":
-        # rarfile no puede crear RAR → hay que usar "rar" externo
-        raise NotImplementedError("Crear CBR requiere la herramienta 'rar' instalada")
+        raise NotImplementedError("Crear CBR requiere 'rar' instalado")
 
-    # 4) Limpiar temporal
     shutil.rmtree(temp_dir)
 
-    return info
+    # Mover original a backup
+    from core.backup import move_to_backup
+    move_to_backup(path)
+
+    return {"needs_conversion": True, "target_path": target_path}
diff --git a/processors/standardizer.py b/processors/standardizer.py
index 6083012..e3cb3e7 100644
--- a/processors/standardizer.py
+++ b/processors/standardizer.py
@@ -1,55 +1,44 @@
 # processors/standardizer.py
 
+from processors.validator import validate_comic
 from processors.cleaner import clean_comic
 from processors.converter import convert_comic
 
+
 class StandardizeResult:
-    def __init__(self, original_path):
-        self.original_path = original_path
+    def __init__(self, path):
+        self.path = path
         self.cleaned = None
         self.converted = None
         self.final_path = None
 
     def __str__(self):
-        msg = f"Estandarización de: {self.original_path}\n"
+        msg = f"Estandarización de: {self.path}\n"
         if self.cleaned:
-            msg += f"  Limpieza: OK ({len(self.cleaned.removed_files)} archivos eliminados)\n"
-        else:
-            msg += "  Limpieza: no realizada\n"
-
+            msg += f"  Limpieza: OK ({len(self.cleaned.removed_files)} eliminados)\n"
         if self.converted:
             if self.converted["needs_conversion"]:
                 msg += f"  Conversión: OK → {self.converted['target_path']}\n"
             else:
                 msg += "  Conversión: no necesaria\n"
-
         msg += f"  Resultado final: {self.final_path}\n"
         return msg
 
 
 def standardize_comic(path, desired_format="cbz"):
-    """
-    Pipeline básico:
-    1. Limpiar
-    2. Convertir
-    """
+    validation = validate_comic(path)
+
+    if validation.errors:
+        raise Exception(f"Archivo corrupto: {path}")
+
     result = StandardizeResult(path)
 
-    # 1) Limpiar
     clean_result = clean_comic(path)
     result.cleaned = clean_result
 
-    # El archivo resultante tras limpiar
-    cleaned_path = clean_result.cleaned_path
-
-    # 2) Convertir
-    convert_result = convert_comic(cleaned_path, desired_format)
+    convert_result = convert_comic(clean_result.cleaned_path, desired_format)
     result.converted = convert_result
 
-    # Ruta final
-    if convert_result["needs_conversion"]:
-        result.final_path = convert_result["target_path"]
-    else:
-        result.final_path = cleaned_path
+    result.final_path = convert_result["target_path"] if convert_result["needs_conversion"] else clean_result.cleaned_path
 
     return result
diff --git a/processors/validator.py b/processors/validator.py
index 93c4ff6..c27c76c 100644
--- a/processors/validator.py
+++ b/processors/validator.py
@@ -3,99 +3,64 @@
 import os
 import zipfile
 import rarfile
-from core.constants import IMAGE_EXTENSIONS, TRASH_FILES
 
 
-IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".webp"}
-TRASH_FILES = {"thumbs.db", ".ds_store"}
-
 class ValidationResult:
     def __init__(self, path):
         self.path = path
-        self.is_valid = True
+        self.real_format = None     # "zip", "rar", None
+        self.extension = None       # ".cbz" o ".cbr"
         self.errors = []
         self.warnings = []
-        self.images = []
-        self.real_format = None  # "rar", "zip", None
-
-    def add_error(self, msg):
-        self.is_valid = False
-        self.errors.append(msg)
-
-    def add_warning(self, msg):
-        self.warnings.append(msg)
 
     def __str__(self):
-        status = "OK" if self.is_valid else "ERROR"
-        return f"[{status}] {self.path}"
+        msg = f"Validación de: {self.path}\n"
+        msg += f"  Formato real: {self.real_format}\n"
+        msg += f"  Extensión: {self.extension}\n"
+        if self.errors:
+            msg += "  Errores:\n"
+            for e in self.errors:
+                msg += f"    - {e}\n"
+        if self.warnings:
+            msg += "  Avisos:\n"
+            for w in self.warnings:
+                msg += f"    - {w}\n"
+        return msg
 
 
-def try_open_rar(path):
+def detect_real_format(path):
+    """Devuelve 'zip', 'rar' o None."""
     try:
-        archive = rarfile.RarFile(path, "r")
-        archive.namelist()  # fuerza lectura
-        return archive
+        zipfile.ZipFile(path).close()
+        return "zip"
     except:
-        return None
+        pass
 
-
-def try_open_zip(path):
     try:
-        archive = zipfile.ZipFile(path, "r")
-        archive.namelist()
-        return archive
+        rarfile.RarFile(path).close()
+        return "rar"
     except:
-        return None
+        pass
+
+    return None
 
 
 def validate_comic(path):
     result = ValidationResult(path)
     ext = os.path.splitext(path)[1].lower()
+    result.extension = ext
 
-    archive = None
+    real = detect_real_format(path)
+    result.real_format = real
 
-    # 1) Intentar abrir como RAR
-    if ext == ".cbr":
-        archive = try_open_rar(path)
-        if archive:
-            result.real_format = "rar"
-        else:
-            # 2) Intentar abrir como ZIP (CBZ renombrado)
-            archive = try_open_zip(path)
-            if archive:
-                result.real_format = "zip"
-                result.add_warning("El archivo tiene extensión .cbr pero es un ZIP (CBZ renombrado)")
-            else:
-                result.add_error("No se pudo abrir como RAR ni como ZIP")
-                return result
-
-    # 3) Si es CBZ, abrir como ZIP
-    elif ext == ".cbz":
-        archive = try_open_zip(path)
-        if archive:
-            result.real_format = "zip"
-        else:
-            result.add_error("No se pudo abrir el archivo ZIP")
-            return result
-
-    else:
-        result.add_error("Extensión no reconocida")
+    if real is None:
+        result.errors.append("Archivo corrupto o ilegible")
         return result
 
-    # 4) Validar contenido
-    file_list = archive.namelist()
+    if ext == ".cbz" and real == "rar":
+        result.warnings.append("Extensión incorrecta: debería ser .cbr")
 
-    for f in file_list:
-        name = f.lower()
-        _, fext = os.path.splitext(name)
-
-        if fext in IMAGE_EXTENSIONS:
-            result.images.append(f)
-
-        if os.path.basename(name) in TRASH_FILES:
-            result.add_warning(f"Archivo basura encontrado: {f}")
-
-    if not result.images:
-        result.add_error("No contiene imágenes válidas")
+    if ext == ".cbr" and real == "zip":
+        result.warnings.append("Extensión incorrecta: debería ser .cbz")
 
     return result