diff --git a/plugins.json b/plugins.json
index 79dab3ef..dc975954 100644
--- a/plugins.json
+++ b/plugins.json
@@ -1534,5 +1534,16 @@
 		"website": "https://svdex.moe",
 		"min_version": "4.8.0",
 		"has_changelog": true
+	},
+	"name_guard": {
+		"title": "Name Guard",
+		"author": "Dedou3D",
+		"description": "Clean folder and cube names for safe ModelEngine exports.",
+		"icon": "drive_file_rename_outline",
+		"version": "1.0.0",
+		"variant": "both",
+		"min_version": "4.0.0",
+		"new_repository_format": true,
+		"tags": ["Minecraft", "ModelEngine", "Utility"]
 	}
 }
diff --git a/plugins/name_guard/about.md b/plugins/name_guard/about.md
new file mode 100644
index 00000000..4954e8be
--- /dev/null
+++ b/plugins/name_guard/about.md
@@ -0,0 +1,31 @@
+# Name Guard
+
+Name Guard cleans folder and cube names so your models export safely.
+
+Before:
+
+`Right Arm`
+- `Cube`
+- `Cube`
+
+After:
+
+`right_arm`
+- `right_arm`
+- `right_arm`
+
+## What It Does
+
+- Converts names to lowercase
+- Removes accents
+- Replaces spaces and invalid characters with `_`
+- Cleans folder names
+- Renames cubes from their parent folder name
+- Keeps root cubes safe by cleaning their own names
+
+## Usage
+
+Open your model, then run:
+
+`Filter > Clean Names`
+
diff --git a/plugins/name_guard/name_guard.js b/plugins/name_guard/name_guard.js
new file mode 100644
index 00000000..edae2f25
--- /dev/null
+++ b/plugins/name_guard/name_guard.js
@@ -0,0 +1,114 @@
+(function() {
+	'use strict';
+
+	const PLUGIN_ID = 'name_guard';
+	const FALLBACK_NAME = 'part';
+
+	let cleanNamesAction;
+
+	function sanitizeName(value, fallback = FALLBACK_NAME) {
+		const sanitized = String(value || '')
+			.normalize('NFD')
+			.replace(/[\u0300-\u036f]/g, '')
+			.toLowerCase()
+			.replace(/[^a-z0-9_.-]+/g, '_')
+			.replace(/_+/g, '_')
+			.replace(/^_+|_+$/g, '');
+
+		return sanitized || fallback;
+	}
+
+	function uniqueName(baseName, usedNames) {
+		let name = baseName;
+		let index = 2;
+
+		while (usedNames.has(name)) {
+			name = `${baseName}_${index}`;
+			index += 1;
+		}
+
+		usedNames.add(name);
+		return name;
+	}
+
+	function getChildGroups(group) {
+		return group.children.filter(child => child instanceof Group);
+	}
+
+	function getChildCubes(group) {
+		return group.children.filter(child => child instanceof Cube);
+	}
+
+	function renameGroupTree(group, usedNamesByGroup) {
+		const parent = group.parent instanceof Group ? group.parent : null;
+		const usedNames = usedNamesByGroup.get(parent) || new Set();
+		usedNamesByGroup.set(parent, usedNames);
+
+		group.name = uniqueName(sanitizeName(group.name), usedNames);
+
+		const childGroupNames = new Set();
+		usedNamesByGroup.set(group, childGroupNames);
+		getChildGroups(group).forEach(childGroup => renameGroupTree(childGroup, usedNamesByGroup));
+
+		const cubeBaseName = sanitizeName(group.name);
+		getChildCubes(group).forEach(cube => {
+			cube.name = cubeBaseName;
+		});
+	}
+
+	function cleanRootCubes() {
+		const usedNames = new Set();
+		Cube.all
+			.filter(cube => !(cube.parent instanceof Group))
+			.forEach(cube => {
+				cube.name = uniqueName(sanitizeName(cube.name), usedNames);
+			});
+	}
+
+	function cleanNames() {
+		if (!Project) {
+			Blockbench.showQuickMessage('Open or create a project first.');
+			return;
+		}
+
+		Undo.initEdit({outliner: true, elements: Cube.all});
+
+		const rootGroups = Group.all.filter(group => !(group.parent instanceof Group));
+		const usedNamesByGroup = new Map();
+		rootGroups.forEach(group => renameGroupTree(group, usedNamesByGroup));
+		cleanRootCubes();
+
+		Undo.finishEdit('Clean names');
+		Canvas.updateAll();
+		Blockbench.showQuickMessage('Names cleaned.');
+	}
+
+	Plugin.register(PLUGIN_ID, {
+		title: 'Name Guard',
+		author: 'Dedou3D',
+		description: 'Clean folder and cube names for safe ModelEngine exports.',
+		icon: 'drive_file_rename_outline',
+		version: '1.0.0',
+		variant: 'both',
+		min_version: '4.0.0',
+		new_repository_format: true,
+		tags: ['Minecraft', 'ModelEngine', 'Utility'],
+		onload() {
+			cleanNamesAction = new Action('clean_name_guard_names', {
+				name: 'Clean Names',
+				description: 'Clean folder and cube names for safe exports.',
+				icon: 'drive_file_rename_outline',
+				category: 'edit',
+				click: cleanNames
+			});
+
+			MenuBar.addAction(cleanNamesAction, 'filter');
+		},
+		onunload() {
+			if (cleanNamesAction) {
+				cleanNamesAction.delete();
+				cleanNamesAction = null;
+			}
+		}
+	});
+})();