diff --git a/src/components/editor/ImageUploadInput.tsx b/src/components/editor/ImageUploadInput.tsx
index 897c4c7..065b526 100644
--- a/src/components/editor/ImageUploadInput.tsx
+++ b/src/components/editor/ImageUploadInput.tsx
@@ -2,7 +2,7 @@
 
 import React, { useRef, useState } from 'react';
 import { Upload, Loader2, Image as ImageIcon } from 'lucide-react';
-import { shrinkImage, uploadFile } from '@/lib/upload';
+import { shrinkImage, shrinkRemoteImage, uploadFile } from '@/lib/upload';
 
 interface ImageUploadInputProps {
   label?: string;
@@ -27,16 +27,13 @@ export const ImageUploadInput: React.FC<ImageUploadInputProps> = ({
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [isUploading, setIsUploading] = useState(false);
 
-  const handleFileChange = async (e: React.ChangeEvent<HTMLInputElement>) => {
-    const file = e.target.files?.[0];
-    if (!file) return;
-
+  const uploadImage = async (file: File) => {
     setIsUploading(true);
     try {
       const small = await shrinkImage(file);
       onChange(await uploadFile(small, small.name));
-    } catch (err: any) {
-      alert(`Chyba pri nahrávaní obrázka: ${err.message}`);
+    } catch (err) {
+      alert(`Chyba pri nahrávaní obrázka: ${(err as Error).message}`);
     } finally {
       setIsUploading(false);
       if (fileInputRef.current) {
@@ -45,6 +42,43 @@ export const ImageUploadInput: React.FC<ImageUploadInputProps> = ({
     }
   };
 
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0];
+    if (file) uploadImage(file);
+  };
+
+  // Vložená URL: príliš veľký obrázok sa zmenší a uloží k nám (posledná spracovaná adresa, aby sa nerobilo dvakrát)
+  const lastCheckedUrl = useRef('');
+  const checkUrl = async (url: string) => {
+    url = url.trim();
+    if (!url || url === lastCheckedUrl.current) return;
+    lastCheckedUrl.current = url;
+    setIsUploading(true);
+    try {
+      const smaller = await shrinkRemoteImage(url);
+      if (smaller) {
+        lastCheckedUrl.current = smaller;
+        onChange(smaller);
+      }
+    } catch (err) {
+      console.warn('Obrázok z URL sa nepodarilo zmenšiť:', err);
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  const handlePaste = (e: React.ClipboardEvent<HTMLInputElement>) => {
+    // obrázok zo schránky (Ctrl+V) → nahrá sa ako súbor
+    const file = [...e.clipboardData.files].find((f) => f.type.startsWith('image/'));
+    if (file) {
+      e.preventDefault();
+      uploadImage(file);
+      return;
+    }
+    const text = e.clipboardData.getData('text');
+    if (/^https?:\/\//i.test(text.trim())) setTimeout(() => checkUrl(text), 0);
+  };
+
   return (
     <div className="space-y-1.5">
       {label && <label className="block text-[11px] font-semibold text-gray-700">{label}</label>}
@@ -71,6 +105,8 @@ export const ImageUploadInput: React.FC<ImageUploadInputProps> = ({
           type="text"
           value={value || ''}
           onChange={(e) => onChange(e.target.value)}
+          onPaste={handlePaste}
+          onBlur={(e) => checkUrl(e.target.value)}
           placeholder={placeholder}
           className="flex-1 min-w-0 text-xs font-mono border border-gray-300 rounded-lg p-2 bg-white"
         />
diff --git a/src/lib/upload.ts b/src/lib/upload.ts
index ed2118e..d9e35e6 100644
--- a/src/lib/upload.ts
+++ b/src/lib/upload.ts
@@ -21,10 +21,10 @@ export async function uploadFile(file: Blob, name: string): Promise<string> {
   return data.url;
 }
 
-// Zmenšenie veľkej fotky pred nahratím: v e-maile má obrázok najviac 600 px (×2 pre ostré displeje),
-// tlačové podklady s tisíckami px a desiatkami MB sú zbytočné (a bucket berie najviac 10 MB).
+// Zmenšenie veľkej fotky pred nahratím: v e-maile má obrázok najviac 600 px, dlhšia strana 1000 px stačí
+// aj na ostré displeje – tlačové podklady s tisíckami px a desiatkami MB sú zbytočné (bucket berie najviac 10 MB).
 // PNG ostáva PNG kvôli priehľadnosti; SVG a GIF (animácie) sa nechávajú tak.
-const MAX_SIDE = 2000;
+const MAX_SIDE = 1000;
 const MAX_BYTES = 9 * 1024 * 1024;
 
 export async function shrinkImage(file: File): Promise<File> {
@@ -54,3 +54,31 @@ export async function shrinkImage(file: File): Promise<File> {
   const name = type === 'image/jpeg' ? file.name.replace(/\.\w+$/, '.jpg') : file.name;
   return new File([blob], name, { type });
 }
+
+// Je adresa už v našom úložisku?
+export function isOwnStorageUrl(url: string): boolean {
+  return url.includes('/storage/v1/object/public/newsletter-assets/');
+}
+
+// Obrázok vložený cez URL: stiahne sa (priamo, ak to cudzí server dovolí, inak cez /api/img),
+// a ak je väčší ako 1000 px, zmenší sa a nahrá do úložiska. Vráti novú adresu, alebo null, ak netreba nič meniť.
+export async function shrinkRemoteImage(url: string): Promise<string | null> {
+  if (!/^https?:\/\//i.test(url) || isOwnStorageUrl(url)) return null;
+  let blob: Blob | null = null;
+  try {
+    const res = await fetch(url);
+    if (res.ok) blob = await res.blob();
+  } catch {
+    // CORS – skúsime cez náš proxy
+  }
+  if (!blob || !blob.type.startsWith('image/')) {
+    const res = await fetch(`/api/img?url=${encodeURIComponent(url)}`);
+    if (!res.ok) return null;
+    blob = await res.blob();
+  }
+  const name = decodeURIComponent(new URL(url).pathname.split('/').pop() || '') || 'obrazok.png';
+  const file = new File([blob], name, { type: blob.type });
+  const small = await shrinkImage(file);
+  if (small === file) return null;
+  return uploadFile(small, small.name);
+}