diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index c8a6f43dbb01..be1f0be2793c 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -4083,7 +4083,7 @@ void EditorNode::_quick_opened() {
 		List<String> scene_extensions;
 		ResourceLoader::get_recognized_extensions_for_type("PackedScene", &scene_extensions);
 
-		if (open_scene_dialog || scene_extensions.find(files[i].get_extension())) {
+		if (open_scene_dialog || scene_extensions.find(files[i].get_extension().to_lower())) {
 			open_request(res_path);
 		} else {
 			load_resource(res_path);
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index 291b939fe92b..3f6769a5ad03 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -5751,8 +5751,10 @@ bool CanvasItemEditorViewport::can_drop_data(const Point2 &p_point, const Varian
 			ResourceLoader::get_recognized_extensions_for_type("Texture2D", &texture_extensions);
 
 			for (int i = 0; i < files.size(); i++) {
+				String extension = files[i].get_extension().to_lower();
+
 				// Check if dragged files with texture or scene extension can be created at least once.
-				if (texture_extensions.find(files[i].get_extension()) || scene_extensions.find(files[i].get_extension())) {
+				if (texture_extensions.find(extension) || scene_extensions.find(extension)) {
 					Ref<Resource> res = ResourceLoader::load(files[i]);
 					if (res.is_null()) {
 						continue;
diff --git a/editor/plugins/node_3d_editor_plugin.cpp b/editor/plugins/node_3d_editor_plugin.cpp
index 3923d257340c..6a9568b2a2bc 100644
--- a/editor/plugins/node_3d_editor_plugin.cpp
+++ b/editor/plugins/node_3d_editor_plugin.cpp
@@ -4150,11 +4150,13 @@ bool Node3DEditorViewport::can_drop_data_fw(const Point2 &p_point, const Variant
 			ResourceLoader::get_recognized_extensions_for_type("Texture", &texture_extensions);
 
 			for (int i = 0; i < files.size(); i++) {
+				String extension = files[i].get_extension().to_lower();
+
 				// Check if dragged files with mesh or scene extension can be created at least once.
-				if (mesh_extensions.find(files[i].get_extension()) ||
-						scene_extensions.find(files[i].get_extension()) ||
-						material_extensions.find(files[i].get_extension()) ||
-						texture_extensions.find(files[i].get_extension())) {
+				if (mesh_extensions.find(extension) ||
+						scene_extensions.find(extension) ||
+						material_extensions.find(extension) ||
+						texture_extensions.find(extension)) {
 					Ref<Resource> res = ResourceLoader::load(files[i]);
 					if (res.is_null()) {
 						continue;