diff --git a/app/lang/de.json b/app/lang/de.json
index 1adc5cc..a794cad 100644
--- a/app/lang/de.json
+++ b/app/lang/de.json
@@ -114,7 +114,9 @@
       "required_answer": "Erforderliche Antwort",
       "finalize": "Antwort finalisieren",
       "already_submitted": "Deine Antwort wurde bereits übermittelt!",
-      "finalize_explain": "Dies gibt den Admins die Möglichkeit deine Antwort zu bewerten und dir Punkte zu geben. Du kannst deine Antwort anschließend nicht mehr ändern!"
+      "finalize_explain": "Dies gibt den Admins die Möglichkeit deine Antwort zu bewerten und dir Punkte zu geben. Du kannst deine Antwort anschließend nicht mehr ändern!",
+      "upload_title": "Antwort wird hochgeladen...",
+      "upload_compress": "Bild wird komprimiert..."
     },
     "hunt": {
       "total_points": "Punktestand: {score}",
diff --git a/app/lang/en.json b/app/lang/en.json
index ce99302..0da698c 100644
--- a/app/lang/en.json
+++ b/app/lang/en.json
@@ -114,7 +114,9 @@
       "required_answer": "Required Answer",
       "finalize": "Finalize answer",
       "already_submitted": "Your final answer has already been submitted!",
-      "finalize_explain": "This allows the admins to review your answer and give you points. You cannot change your answer afterwards!"
+      "finalize_explain": "This allows the admins to review your answer and give you points. You cannot change your answer afterwards!",
+      "upload_title": "Uploading answer...",
+      "upload_compress": "Compressing image..."
     },
     "hunt": {
       "total_points": "Total points: {score}",
diff --git a/app/pages/hunt/[huntSlug]/[questSlug]/index.vue b/app/pages/hunt/[huntSlug]/[questSlug]/index.vue
index 4a8d31a..64b7752 100644
--- a/app/pages/hunt/[huntSlug]/[questSlug]/index.vue
+++ b/app/pages/hunt/[huntSlug]/[questSlug]/index.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { createImageURL } from '#shared/utils/image';
+import { compressImage, createImageURL } from '#shared/utils/image';
 import ClickableImage from '~/components/ClickableImage.vue';
 import MultilineString from '~/components/MultilineString.vue';
 import { useI18nKey } from '~/composables/useI18nKey';
@@ -55,11 +55,24 @@ const textType = {
 
 const newImage = ref<File>();
 
+const newImageURL = computed(() =>
+  newImage.value ? createImageURL(newImage.value) : undefined
+);
+
 const uploading = ref(false);
+const uploadingImage = ref(false);
+const compressing = ref(false);
+const uploadProgress = ref(1);
 const submitError = ref('');
+useEventListener(window, 'beforeunload', (ev) => {
+  if (uploading.value) {
+    ev.preventDefault();
+  }
+});
 async function submit() {
   uploading.value = true;
   submitError.value = '';
+  uploadProgress.value = 0;
 
   const body = new FormData();
   body.set('lang', locale.value);
@@ -74,27 +87,38 @@ async function submit() {
     body.set('final', 'true');
   }
   if (newImage.value) {
-    body.set('image', newImage.value);
+    uploadingImage.value = true;
+    compressing.value = true;
+    const compressedImage = await compressImage(newImage.value);
+    compressing.value = false;
+    body.set('image', compressedImage);
   }
+  const xhr = new XMLHttpRequest();
 
   try {
-    await $fetch(`/api/quest/${questSlug?.id}/submit`, {
-      method: 'POST',
-      body
+    await new Promise((resolve) => {
+      xhr.upload.addEventListener('progress', (event) => {
+        if (event.lengthComputable) {
+          uploadProgress.value = event.loaded / event.total;
+        }
+      });
+      xhr.addEventListener('loadend', () => {
+        resolve(xhr.readyState === 4 && xhr.status === 200);
+        uploadProgress.value = 1;
+      });
+      xhr.open('POST', `/api/quest/${questSlug?.id}/submit`, true);
+      xhr.withCredentials = true;
+      xhr.send(body);
     });
 
     await refresh();
     answer.value = data.value?.answer?.text;
     newImage.value = undefined;
   } catch (e) {
-    if (e instanceof Error && 'statusCode' in e && e.statusCode === 418) {
+    if (xhr.status === 418) {
       submitError.value = t('page.quest.already_finalized');
       await refresh();
-    } else if (
-      e instanceof Error &&
-      'statusCode' in e &&
-      e.statusCode === 409
-    ) {
+    } else if (xhr.status === 409) {
       submitError.value = t('page.quest.conflict');
     } else {
       submitError.value = parseError(e);
@@ -102,11 +126,31 @@ async function submit() {
   }
 
   uploading.value = false;
+  uploadingImage.value = false;
 }
 </script>
 
 <template>
   <div>
+    <VaModal
+      :model-value="uploadingImage"
+      no-outside-dismiss
+      hide-default-actions
+      no-dismiss
+    >
+      <h2 class="text-2xl font-bold">{{ t('page.quest.upload_title') }}</h2>
+      <p v-if="compressing" class="text-lg">
+        {{ t('page.quest.upload_compress') }}
+      </p>
+      <VaProgressCircle
+        v-else
+        class="mx-auto"
+        :model-value="uploadProgress * 100"
+        size="50dvw"
+      >
+        {{ (uploadProgress * 100).toFixed(0) + '%' }}
+      </VaProgressCircle>
+    </VaModal>
     <VaButtonGroup>
       <VaButton
         icon="arrow_back"
@@ -230,8 +274,8 @@ async function submit() {
               </VaInput>
 
               <VaImage
-                v-if="newImage"
-                :src="createImageURL(newImage)"
+                v-if="newImageURL"
+                :src="newImageURL"
                 class="max-h-60 w-full"
                 fit="contain"
                 lazy
@@ -279,7 +323,7 @@ async function submit() {
                     newImage ||
                     data.answer?.text !== answer ||
                     data.answer?.final !== final
-                  )
+                  ) || uploading
                 "
                 :loading="uploading"
                 @click="submit"
diff --git a/bun.lock b/bun.lock
index dfd18c3..d1b72ea 100644
--- a/bun.lock
+++ b/bun.lock
@@ -13,6 +13,7 @@
         "@vuestic/tailwind": "^0.1.5",
         "@vueuse/nuxt": "13.6.0",
         "argon2": "^0.43.1",
+        "compressorjs": "^1.2.1",
         "eslint": "^9.0.0",
         "h3-zod": "^0.5.3",
         "minio": "^8.0.5",
@@ -777,6 +778,8 @@
 
     "block-stream2": ["block-stream2@2.1.0", "", { "dependencies": { "readable-stream": "^3.4.0" } }, "sha512-suhjmLI57Ewpmq00qaygS8UgEq2ly2PCItenIyhMqVjo4t4pGzqMvfgJuX8iWTeSDdfSSqS6j38fL4ToNL7Pfg=="],
 
+    "blueimp-canvas-to-blob": ["blueimp-canvas-to-blob@3.29.0", "", {}, "sha512-0pcSSGxC0QxT+yVkivxIqW0Y4VlO2XSDPofBAqoJ1qJxgH9eiUDLv50Rixij2cDuEfx4M6DpD9UGZpRhT5Q8qg=="],
+
     "boolbase": ["boolbase@1.0.0", "", {}, "sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww=="],
 
     "brace-expansion": ["brace-expansion@1.1.12", "", { "dependencies": { "balanced-match": "^1.0.0", "concat-map": "0.0.1" } }, "sha512-9T9UjW3r0UW5c1Q7GTwllptXwhvYmEzFhzMfZ9H7FQWt+uZePjZPjBP/W1ZEyZ1twGWom5/56TF4lPcqjnDHcg=="],
@@ -875,6 +878,8 @@
 
     "compress-commons": ["compress-commons@6.0.2", "", { "dependencies": { "crc-32": "^1.2.0", "crc32-stream": "^6.0.0", "is-stream": "^2.0.1", "normalize-path": "^3.0.0", "readable-stream": "^4.0.0" } }, "sha512-6FqVXeETqWPoGcfzrXb37E50NP0LXT8kAMu5ooZayhWWdgEY4lBEEcbQNXtkuKQsGduxiIcI4gOTsxTmuq/bSg=="],
 
+    "compressorjs": ["compressorjs@1.2.1", "", { "dependencies": { "blueimp-canvas-to-blob": "^3.29.0", "is-blob": "^2.1.0" } }, "sha512-+geIjeRnPhQ+LLvvA7wxBQE5ddeLU7pJ3FsKFWirDw6veY3s9iLxAQEw7lXGHnhCJvBujEQWuNnGzZcvCvdkLQ=="],
+
     "concat-map": ["concat-map@0.0.1", "", {}, "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="],
 
     "confbox": ["confbox@0.2.2", "", {}, "sha512-1NB+BKqhtNipMsov4xI/NnhCKp9XG9NamYp5PVm9klAT0fsrNPjaFICsCFhNhwZJKNh7zB/3q8qXz0E9oaMNtQ=="],
@@ -1295,6 +1300,8 @@
 
     "is-binary-path": ["is-binary-path@2.1.0", "", { "dependencies": { "binary-extensions": "^2.0.0" } }, "sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw=="],
 
+    "is-blob": ["is-blob@2.1.0", "", {}, "sha512-SZ/fTft5eUhQM6oF/ZaASFDEdbFVe89Imltn9uZr03wdKMcWNVYSMjQPFtg05QuNkt5l5c135ElvXEQG0rk4tw=="],
+
     "is-builtin-module": ["is-builtin-module@5.0.0", "", { "dependencies": { "builtin-modules": "^5.0.0" } }, "sha512-f4RqJKBUe5rQkJ2eJEJBXSticB3hGbN9j0yxxMQFqIW89Jp9WYFtzfTcRlstDKVUTRzSOTLKRfO9vIztenwtxA=="],
 
     "is-callable": ["is-callable@1.2.7", "", {}, "sha512-1BC0BVFhS/p0qtw6enp8e+8OD0UrK0oFLztSjNzhcKA3WDuJxxAPXzPuPtKkjEY9UUoEWlX/8fgKeu2S8i9JTA=="],
diff --git a/package.json b/package.json
index 5326260..f662b96 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "@vuestic/tailwind": "^0.1.5",
     "@vueuse/nuxt": "13.6.0",
     "argon2": "^0.43.1",
+    "compressorjs": "^1.2.1",
     "eslint": "^9.0.0",
     "h3-zod": "^0.5.3",
     "minio": "^8.0.5",
diff --git a/shared/utils/image.ts b/shared/utils/image.ts
index 3ea4f95..9c26f97 100644
--- a/shared/utils/image.ts
+++ b/shared/utils/image.ts
@@ -1 +1,22 @@
+import Compressor from 'compressorjs';
+
 export const createImageURL = (file: File) => URL.createObjectURL(file);
+
+export async function compressImage(file: File) {
+  return new Promise<File | Blob>((resolve, reject) => {
+    if (!file) {
+      reject();
+      return;
+    }
+    new Compressor(file, {
+      quality: 0.8,
+      error(error) {
+        console.error(error);
+        reject(error);
+      },
+      success(result) {
+        resolve(result);
+      }
+    });
+  }).catch(() => file);
+}