diff --git a/src/App.tsx b/src/App.tsx
index e9e253b..a01885e 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -111,8 +111,9 @@ function App() {
       set_outType(config.supportedOutTypes?.[0] || "ttf");
     }
     if (fontList.length > 0) {
-      /** 标语随机使用一个字体展示 */
-      const randomFont = fontList[Math.floor(Math.random() * fontList.length)];
+      /** 标语随机使用一个 TTF 字体展示（目前仅 TTF 格式兼容性最佳） */
+      const ttfFonts = fontList.filter((f) => /\.ttf$/i.test(f.name));
+      const randomFont = (ttfFonts.length > 0 ? ttfFonts : fontList)[Math.floor(Math.random() * (ttfFonts.length > 0 ? ttfFonts : fontList).length)];
       (globalThis as any).WebFont?.loadText({
         fontName: randomFont.name,
         text: SLOGAN,
diff --git a/src/UploadSection.tsx b/src/UploadSection.tsx
index e1d9659..84f7635 100644
--- a/src/UploadSection.tsx
+++ b/src/UploadSection.tsx
@@ -3,6 +3,9 @@ import { uploadFont, type UploadResult, type ServerConfig } from "./api";
 
 const ACCEPT = ".ttf,.otf,.woff,.woff2";
 
+/** 目前仅 TTF 格式兼容性最佳，上传其他格式可能无法正常使用 */
+const UPLOAD_TIP = "当前仅 TTF 格式兼容性最佳，建议上传 .ttf 字体文件";
+
 const btn = {
   padding: "6px 20px",
   "font-size": "14px",
@@ -173,6 +176,9 @@ export default function UploadSection(props: { config: ServerConfig; onUploaded:
     <Show when={canUpload()}>
       <section style={section}>
         <label style={{ ...label, "font-size": "14px", "font-weight": 500, "margin-bottom": "12px" }}>上传字体</label>
+        <div style={{ "font-size": "12px", color: "#e6a700", "margin-bottom": "12px" }}>
+          {UPLOAD_TIP}
+        </div>
 
         <Show when={temp.msg()}>
           {(m) => (