diff --git a/src/app/components/MediaBrowser.tsx b/src/app/components/MediaBrowser.tsx
index 79eb251..deab65b 100644
--- a/src/app/components/MediaBrowser.tsx
+++ b/src/app/components/MediaBrowser.tsx
@@ -14,6 +14,7 @@ import {
 import {
   createFolder,
   deletePath,
+  fileExists,
   humanFileSize,
   joinPath,
   listDirectory,
@@ -99,7 +100,11 @@ export default function MediaBrowser({ currentPath, onSelect, onClose }: MediaBr
 
   const handleUpload = async (file: File) => {
     if (!path) return;
-    try { await putFileContents(joinPath(path, file.name), await file.arrayBuffer()); toast.success(`Uploaded ${file.name}`); void load(path); }
+    const target = joinPath(path, file.name);
+    if (await fileExists(target)) {
+      if (!window.confirm(`"${file.name}" already exists. Overwrite?`)) return;
+    }
+    try { await putFileContents(target, await file.arrayBuffer()); toast.success(`Uploaded ${file.name}`); void load(path); }
     catch (e: any) { toast.error(`Failed to upload ${file.name}: ${e?.message ?? e}`); }
   };
 
diff --git a/src/app/components/MediaManager.tsx b/src/app/components/MediaManager.tsx
index 164f065..05933f2 100644
--- a/src/app/components/MediaManager.tsx
+++ b/src/app/components/MediaManager.tsx
@@ -876,8 +876,12 @@ export default function MediaManager({ initialPath = '/', rootPath, title, confi
   // ── Upload ───────────────────────────────────────────────────────────────
 
   const handleUpload = async (file: File) => {
+    const target = joinPath(path, file.name);
+    if (await fileExists(target)) {
+      if (!window.confirm(`"${file.name}" already exists. Overwrite?`)) return;
+    }
     try {
-      await putFileContents(joinPath(path, file.name), await file.arrayBuffer());
+      await putFileContents(target, await file.arrayBuffer());
       toast.success(`Uploaded ${file.name}`);
       void load(path);
     } catch (e: any) { toast.error(`Upload failed for ${file.name}: ${e?.message ?? e}`); }