diff --git a/cms/api/package-lock.json b/cms/api/package-lock.json
index 2dd6e04..3fbcfbd 100644
--- a/cms/api/package-lock.json
+++ b/cms/api/package-lock.json
@@ -11,7 +11,18 @@
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         "@supabase/supabase-js": "^2.47.10",
         "gray-matter": "^4.0.3",
-        "hono": "^4.6.14"
+        "hono": "^4.6.14",
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+      }
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+      "optional": true,
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       }
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     "node_modules/@hono/node-server": {
@@ -26,6 +37,403 @@
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+      "os": [
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+    "node_modules/@img/sharp-win32-x64": {
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+      "resolved": "https://registry.npmjs.org/@img/sharp-win32-x64/-/sharp-win32-x64-0.33.5.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "license": "Apache-2.0 AND LGPL-3.0-or-later",
+      "optional": true,
+      "os": [
+        "win32"
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     "node_modules/@supabase/auth-js": {
       "version": "2.106.2",
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@@ -119,6 +527,56 @@
         "sprintf-js": "~1.0.2"
       }
     },
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+      "license": "MIT",
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+        "color-string": "^1.9.0"
+      },
+      "engines": {
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+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
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+      "license": "MIT",
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+      "dependencies": {
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+        "simple-swizzle": "^0.2.2"
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+      "license": "Apache-2.0",
+      "engines": {
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+    },
     "node_modules/esprima": {
       "version": "4.0.1",
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@@ -177,6 +635,12 @@
         "node": ">=20.0.0"
       }
     },
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@@ -221,6 +685,66 @@
         "node": ">=4"
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+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.1.tgz",
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+      "license": "ISC",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
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+    "node_modules/sharp": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.33.5.tgz",
+      "integrity": "sha512-haPVm1EkS9pgvHrQ/F3Xy+hgcuMV0Wm9vfIBSiwZ05k+xgb0PkBQpGsAA/oWdDobNaZTH5ppvHtzCFbnSEwHVw==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "color": "^4.2.3",
+        "detect-libc": "^2.0.3",
+        "semver": "^7.6.3"
+      },
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-darwin-arm64": "0.33.5",
+        "@img/sharp-darwin-x64": "0.33.5",
+        "@img/sharp-libvips-darwin-arm64": "1.0.4",
+        "@img/sharp-libvips-darwin-x64": "1.0.4",
+        "@img/sharp-libvips-linux-arm": "1.0.5",
+        "@img/sharp-libvips-linux-arm64": "1.0.4",
+        "@img/sharp-libvips-linux-s390x": "1.0.4",
+        "@img/sharp-libvips-linux-x64": "1.0.4",
+        "@img/sharp-libvips-linuxmusl-arm64": "1.0.4",
+        "@img/sharp-libvips-linuxmusl-x64": "1.0.4",
+        "@img/sharp-linux-arm": "0.33.5",
+        "@img/sharp-linux-arm64": "0.33.5",
+        "@img/sharp-linux-s390x": "0.33.5",
+        "@img/sharp-linux-x64": "0.33.5",
+        "@img/sharp-linuxmusl-arm64": "0.33.5",
+        "@img/sharp-linuxmusl-x64": "0.33.5",
+        "@img/sharp-wasm32": "0.33.5",
+        "@img/sharp-win32-ia32": "0.33.5",
+        "@img/sharp-win32-x64": "0.33.5"
+      }
+    },
+    "node_modules/simple-swizzle": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.4.tgz",
+      "integrity": "sha512-nAu1WFPQSMNr2Zn9PGSZK9AGn4t/y97lEm+MXTtUDwfP0ksAIX4nO+6ruD9Jwut4C49SB1Ws+fbXsm/yScWOHw==",
+      "license": "MIT",
+      "dependencies": {
+        "is-arrayish": "^0.3.1"
+      }
+    },
     "node_modules/sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
diff --git a/cms/api/package.json b/cms/api/package.json
index 39f175d..158abed 100644
--- a/cms/api/package.json
+++ b/cms/api/package.json
@@ -12,6 +12,7 @@
     "@hono/node-server": "^1.13.7",
     "@supabase/supabase-js": "^2.47.10",
     "gray-matter": "^4.0.3",
-    "hono": "^4.6.14"
+    "hono": "^4.6.14",
+    "sharp": "^0.33.5"
   }
 }
diff --git a/cms/api/src/routes/upload.js b/cms/api/src/routes/upload.js
index 8cb4de8..6f7cb7a 100644
--- a/cms/api/src/routes/upload.js
+++ b/cms/api/src/routes/upload.js
@@ -1,11 +1,14 @@
 import { Hono } from 'hono';
 import { mkdir, writeFile } from 'node:fs/promises';
 import path from 'node:path';
+import sharp from 'sharp';
 
+// Bild-Upload → static/images/. Raster-Bilder werden zu WebP konvertiert
+// (kleiner, web-optimiert), auf max. 2000px begrenzt, EXIF-Rotation korrigiert.
+// SVG/GIF bleiben unangetastet (Vektor/Animation erhalten).
 const SITE_DIR = process.env.SITE_DIR || '/site';
+const PASSTHROUGH = new Set(['.svg', '.gif']);
 
-// Bild-Upload → static/images/<name>. Hugo kopiert das beim Build nach
-// public/images/, cover_image referenziert es als /images/<name>.
 const upload = new Hono();
 
 upload.post('/', async (c) => {
@@ -13,22 +16,39 @@ upload.post('/', async (c) => {
   const file = body['file'];
   if (!file || typeof file === 'string') return c.json({ error: 'Keine Datei' }, 400);
 
-  const name = safeName(file.name);
   const dir = path.join(SITE_DIR, 'static', 'images');
   await mkdir(dir, { recursive: true });
-  await writeFile(path.join(dir, name), Buffer.from(await file.arrayBuffer()));
 
-  return c.json({ url: `/images/${name}` });
+  const buffer = Buffer.from(await file.arrayBuffer());
+  const ext = path.extname(file.name || '').toLowerCase();
+  const base = `${safeBase(file.name)}-${uid()}`;
+
+  let outName, outBuf;
+  if (PASSTHROUGH.has(ext)) {
+    outName = `${base}${ext}`;
+    outBuf = buffer;
+  } else {
+    outName = `${base}.webp`;
+    outBuf = await sharp(buffer)
+      .rotate()
+      .resize({ width: 2000, withoutEnlargement: true })
+      .webp({ quality: 82 })
+      .toBuffer();
+  }
+
+  await writeFile(path.join(dir, outName), outBuf);
+  return c.json({ url: `/images/${outName}` });
 });
 
-// Sicherer Dateiname: nur basename, kleingeschrieben, ohne Pfad/Sonderzeichen.
-function safeName(raw) {
-  const base = path.basename(String(raw || 'bild'));
-  const cleaned = base
-    .toLowerCase()
-    .replace(/[^a-z0-9._-]+/g, '-')
-    .replace(/^-+|-+$/g, '');
+// Sicherer Basisname ohne Endung.
+function safeBase(raw) {
+  const base = path.basename(String(raw || 'bild')).replace(/\.[^.]+$/, '');
+  const cleaned = base.toLowerCase().replace(/[^a-z0-9._-]+/g, '-').replace(/^-+|-+$/g, '');
   return cleaned || 'bild';
 }
+// Kurze eindeutige Endung, damit gleichnamige Uploads nicht kollidieren.
+function uid() {
+  return Date.now().toString(36).slice(-4) + Math.random().toString(36).slice(2, 5);
+}
 
 export default upload;