diff --git a/tool/batch_convert.py b/tool/batch_convert.py
old mode 100644
new mode 100755
index 824e852..670f10c
--- a/tool/batch_convert.py
+++ b/tool/batch_convert.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/demucs2safetensors.py b/tool/demucs2safetensors.py
old mode 100644
new mode 100755
index e373f86..15b17b6
--- a/tool/demucs2safetensors.py
+++ b/tool/demucs2safetensors.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/download_model.py b/tool/download_model.py
old mode 100644
new mode 100755
index 4ba3510..7d8d03c
--- a/tool/download_model.py
+++ b/tool/download_model.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/onnx2safetensors.py b/tool/onnx2safetensors.py
old mode 100644
new mode 100755
index c1403f8..fe51caa
--- a/tool/onnx2safetensors.py
+++ b/tool/onnx2safetensors.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/show_class.py b/tool/show_class.py
old mode 100644
new mode 100755
index deb62ed..fe76389
--- a/tool/show_class.py
+++ b/tool/show_class.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/show_db.py b/tool/show_db.py
old mode 100644
new mode 100755
index 9ff86a0..170a332
--- a/tool/show_db.py
+++ b/tool/show_db.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/show_metadata.py b/tool/show_metadata.py
old mode 100644
new mode 100755
index d778f2b..8d09bee
--- a/tool/show_metadata.py
+++ b/tool/show_metadata.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/show_onnx.py b/tool/show_onnx.py
old mode 100644
new mode 100755
index 9a882fd..53c6026
--- a/tool/show_onnx.py
+++ b/tool/show_onnx.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright (c) 2025 Salvador E. Tropea
 # Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
 # License: GPLv3
diff --git a/tool/uvr_hash.py b/tool/uvr_hash.py
old mode 100644
new mode 100755