diff --git a/templates/index.html b/templates/index.html
index b020597..10b33ba 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -109,6 +109,8 @@
 
     let files = [];
 
+    const SUPPORTED_EXTENSIONS = ['.ncm', '.kgm', '.kgma', '.vpr'];
+
     // 点击上传区域选择文件
     dropZone.addEventListener('click', () => fileInput.click());
 
@@ -139,6 +141,11 @@
 
     function handleFiles(fileListObj) {
       for (const f of fileListObj) {
+        const ext = f.name.slice(f.name.lastIndexOf('.')).toLowerCase();
+        if (!SUPPORTED_EXTENSIONS.includes(ext)) {
+          alert('不支持的文件格式: ' + f.name + '\\n仅支持: .ncm / .kgm / .kgma / .vpr');
+          continue;
+        }
         if (files.some(existing => existing.name === f.name)) continue;
         files.push(f);
       }