diff --git a/extensions-builtin/sd_forge_controlnet_example/preload.py b/extensions-builtin/sd_forge_controlnet_example/preload.py
new file mode 100644
index 00000000..ddc29489
--- /dev/null
+++ b/extensions-builtin/sd_forge_controlnet_example/preload.py
@@ -0,0 +1,6 @@
+def preload(parser):
+    parser.add_argument(
+        "--show-controlnet-example",
+        action="store_true",
+        help="Show development example extension for ControlNet.",
+    )
diff --git a/extensions-builtin/sd_forge_controlnet_example/scripts/sd_forge_controlnet_example.py b/extensions-builtin/sd_forge_controlnet_example/scripts/sd_forge_controlnet_example.py
new file mode 100644
index 00000000..9b262ca8
--- /dev/null
+++ b/extensions-builtin/sd_forge_controlnet_example/scripts/sd_forge_controlnet_example.py
@@ -0,0 +1,40 @@
+import gradio as gr
+
+from modules import scripts
+from modules.shared_cmd_options import cmd_opts
+
+
+class ControlNetExampleForge(scripts.Script):
+    def title(self):
+        return "ControlNet Example for Developers"
+
+    def show(self, is_img2img):
+        # make this extension visible in both txt2img and img2img tab.
+        return scripts.AlwaysVisible
+
+    def ui(self, *args, **kwargs):
+        with gr.Accordion(open=False, label=self.title()):
+            gr.HTML('This is an example controlnet extension for developers.')
+            gr.HTML('You see this extension because you used --show-controlnet-example')
+            input_image = gr.Image(source='upload', type='numpy')
+            funny_slider = gr.Slider(label='This slider does nothing. It just shows you how to transfer parameters.')
+
+        return input_image, funny_slider
+
+    def process_batch(self, p, *script_args, **kwargs):
+        input_image, funny_slider = script_args
+
+        # This slider does nothing. It just shows you how to transfer parameters.
+        del funny_slider
+
+        if input_image is None:
+            return
+
+        print('Input image is read')
+        
+        return
+
+
+# Use --show-controlnet-example to see this extension.
+if not cmd_opts.show_controlnet_example:
+    del ControlNetExampleForge