diff --git a/index.html b/index.html
index 3ed82b5..399c876 100644
--- a/index.html
+++ b/index.html
@@ -77,6 +77,13 @@
         </div>
       </div>
 
+      <label class="flex items-start gap-3 border border-neutral-200 rounded-xl px-3 py-3">
+        <input id="chk-semi-transparent" type="checkbox" class="mt-1 h-4 w-4 accent-neutral-800">
+        <span class="text-sm text-neutral-600 leading-snug">
+          semi-transparent (remove bg per frame + export animated webp)
+        </span>
+      </label>
+
       <button id="btn-generate" class="bg-neutral-800 text-white rounded-lg px-6 py-3 hover:bg-neutral-700 transition flex items-center justify-center gap-2 text-lg">
         <i data-lucide="sparkles" class="w-5 h-5"></i>
         generate gif