diff --git a/admin.html b/admin.html
index ed403b3..de82c2d 100644
--- a/admin.html
+++ b/admin.html
@@ -491,20 +491,22 @@
       const lbl = document.getElementById(labelId);
       lbl.style.opacity = '0.5';
 
-      const resized = await resizeImage(file);
+      let resized;
+      try { resized = await resizeImage(file); } catch (e) { lbl.style.opacity = ''; showToast('⚠️ Kuvan käsittely epäonnistui: ' + e.message); return; }
+
       const formData = new FormData();
       formData.append('file', resized, resized.name || 'image.jpg');
       try {
         const res = await fetch('upload.php', { method: 'POST', body: formData });
-        if (!res.ok) throw new Error(await res.text());
         const data = await res.json();
+        if (data.error) throw new Error(data.error);
         document.getElementById(hiddenId).value = data.url;
         const prev = document.getElementById(previewId);
         prev.src = data.url;
         prev.style.display = 'block';
         lbl.classList.add('has-image');
       } catch (e) {
-        showToast('⚠️ Kuvan lataus epäonnistui. Tuetut muodot: JPG, PNG, GIF, WebP (max 20 MB).');
+        showToast('⚠️ ' + e.message);
       } finally {
         lbl.style.opacity = '';
       }
diff --git a/script.js b/script.js
index fcfe8c1..e0353fb 100644
--- a/script.js
+++ b/script.js
@@ -427,20 +427,22 @@ async function uploadImg(input, hiddenId, previewId, labelId) {
   const lbl = document.getElementById(labelId);
   lbl.style.opacity = '0.5';
 
-  const resized = await resizeImage(file);
+  let resized;
+  try { resized = await resizeImage(file); } catch (e) { lbl.style.opacity = ''; alert('Kuvan käsittely epäonnistui: ' + e.message); return; }
+
   const formData = new FormData();
   formData.append('file', resized, resized.name || 'image.jpg');
   try {
     const res = await fetch('upload.php', { method: 'POST', body: formData });
-    if (!res.ok) throw new Error(await res.text());
     const data = await res.json();
+    if (data.error) throw new Error(data.error);
     document.getElementById(hiddenId).value = data.url;
     const prev = document.getElementById(previewId);
     prev.src = data.url;
     prev.style.display = 'block';
     lbl.classList.add('has-image');
   } catch (e) {
-    alert('Kuvan lataus epäonnistui. Tuetut muodot: JPG, PNG, GIF, WebP (max 20 MB).');
+    alert('Kuvan lataus epäonnistui: ' + e.message);
   } finally {
     lbl.style.opacity = '';
   }