diff --git a/app/templates/admin_patches.html b/app/templates/admin_patches.html
index 6008576..8cfe396 100644
--- a/app/templates/admin_patches.html
+++ b/app/templates/admin_patches.html
@@ -11,6 +11,7 @@
         .patch-preview { width: 140px; height: 140px; object-fit: contain; padding: 4px; background: #242424; border: 2px dashed #78716c; border-radius: 12px; }
         .patch-placeholder { display: grid; place-items: center; font-size: 2.5rem; }
         .patch-upload { display: grid; gap: 8px; }
+        .patch-upload-status { min-height: 1.2em; color: var(--muted); font-size: .85rem; }
     </style>
 </head>
 <body>
@@ -26,6 +27,7 @@
                     <div><strong>{{ patch.name }}</strong><div class="admin-meta">{{ patch.description }} · {{ patch.code }}</div></div>
                     <form class="patch-upload" method="post" action="/admin/patches/{{ patch.code }}" enctype="multipart/form-data">
                         <input type="file" name="image" accept="image/jpeg,image/png,image/webp" required>
+                        <span class="patch-upload-status">Das Bild wird vor dem Upload automatisch optimiert.</span>
                         <button class="button" type="submit">{% if patch.image_path %}Bild ersetzen{% else %}Bild hochladen{% endif %}</button>
                     </form>
                     {% if patch.image_path %}<form method="post" action="/admin/patches/{{ patch.code }}/delete" onsubmit="return confirm('Patch-Bild entfernen und wieder das Symbol verwenden?');"><button class="admin-danger" type="submit">Bild entfernen</button></form>{% endif %}
@@ -34,5 +36,62 @@
         </div>
     </section>
 </main>
+<script>
+const patchForms = document.querySelectorAll(".patch-upload");
+
+async function optimizePatchImage(file) {
+    const bitmap = await createImageBitmap(file);
+    const maxSide = 800;
+    const scale = Math.min(1, maxSide / Math.max(bitmap.width, bitmap.height));
+    const canvas = document.createElement("canvas");
+    canvas.width = Math.max(1, Math.round(bitmap.width * scale));
+    canvas.height = Math.max(1, Math.round(bitmap.height * scale));
+    const context = canvas.getContext("2d");
+    context.imageSmoothingEnabled = true;
+    context.imageSmoothingQuality = "high";
+    context.drawImage(bitmap, 0, 0, canvas.width, canvas.height);
+    bitmap.close();
+
+    let quality = 0.9;
+    let blob;
+    do {
+        blob = await new Promise(resolve => canvas.toBlob(resolve, "image/webp", quality));
+        quality -= 0.1;
+    } while (blob && blob.size > 700 * 1024 && quality >= 0.5);
+
+    if (!blob) {
+        throw new Error("Bild konnte nicht verarbeitet werden");
+    }
+    return new File([blob], "patch.webp", {type: "image/webp"});
+}
+
+patchForms.forEach(form => {
+    form.addEventListener("submit", async event => {
+        if (form.dataset.optimized === "true") return;
+        event.preventDefault();
+        const input = form.querySelector('input[type="file"]');
+        const status = form.querySelector(".patch-upload-status");
+        const button = form.querySelector('button[type="submit"]');
+        const file = input.files[0];
+        if (!file) return;
+
+        button.disabled = true;
+        status.textContent = "Bild wird optimiert …";
+        try {
+            const optimized = await optimizePatchImage(file);
+            const transfer = new DataTransfer();
+            transfer.items.add(optimized);
+            input.files = transfer.files;
+            form.dataset.optimized = "true";
+            status.textContent = `Optimiert: ${Math.ceil(optimized.size / 1024)} KB – wird hochgeladen …`;
+            form.requestSubmit();
+        } catch (error) {
+            console.error("Patch image optimization failed:", error);
+            status.textContent = "Das Bild konnte nicht optimiert werden. Bitte ein kleineres JPG, PNG oder WebP wählen.";
+            button.disabled = false;
+        }
+    });
+});
+</script>
 </body>
 </html>
