diff --git a/functions/src/api/routes/event/exportSchedulePdf.ts b/functions/src/api/routes/event/exportSchedulePdf.ts
index 01eab701..7855a074 100644
--- a/functions/src/api/routes/event/exportSchedulePdf.ts
+++ b/functions/src/api/routes/event/exportSchedulePdf.ts
@@ -6,7 +6,7 @@ import { getFirebaseProjectId } from '../../../utils/getFirebaseProjectId'
 import { getServiceAPIKey } from '../../../serviceApi/serviceApiKeyPreHandler'
 import { getIndividualDays } from '../../../../../src/utils/dates/diffDays'
 import { uploadBufferToStorage } from '../file/utils/uploadBufferToStorage'
-import { addPdfFileToEvent, getFilesNames, getUploadFilePath } from '../deploy/updateWebsiteActions/getFilesNames'
+import { addPdfFileToEvent } from '../deploy/updateWebsiteActions/getFilesNames'
 import { getFileName } from '../../other/getFileName'
 
 const ExportPdfReply = Type.Object({
@@ -130,17 +130,8 @@ export const exportSchedulePdfRoute = (fastify: FastifyInstance, options: any, d
                     return reply.status(400).send(publicFileUrlOrError)
                 }
 
-                if (!event.files?.pdf) {
-                    const updatedEvent = await EventDao.getEvent(fastify.firebase, eventId)
-                    const eventFiles = await getFilesNames(fastify.firebase, updatedEvent)
-                    const uploadFilePath = getUploadFilePath(eventFiles)
-                    return reply.status(200).send({
-                        pdf: uploadFilePath.pdf,
-                    })
-                }
-
                 reply.status(200).send({
-                    pdf: getUploadFilePath(event.files).pdf,
+                    pdf: publicFileUrlOrError,
                 })
             } catch (err) {
                 const error = err as Error
diff --git a/src/services/firebase.ts b/src/services/firebase.ts
index bda28c4a..9faa1c3a 100644
--- a/src/services/firebase.ts
+++ b/src/services/firebase.ts
@@ -34,6 +34,22 @@ export const isStorageUrl = (url: string | null | undefined): boolean => {
     return url.startsWith(baseStorageUrl) || url.startsWith(alternativeStorageUrl)
 }
 
+// Strip a full public storage URL down to its bucket-relative path. Firebase's
+// ref(storage, ...) only understands gs:// or firebasestorage URLs, so a public
+// googleapis.com URL must be reduced to a plain path first.
+export const storageUrlToPath = (urlOrPath: string): string => {
+    if (urlOrPath.startsWith(alternativeStorageUrl)) {
+        return urlOrPath.slice(alternativeStorageUrl.length)
+    }
+    if (urlOrPath.startsWith(`${baseStorageUrl}/`)) {
+        return urlOrPath.slice(baseStorageUrl.length + 1)
+    }
+    return urlOrPath
+}
+
+// Build the public URL for a bucket-relative storage path.
+export const pathToStorageUrl = (path: string): string => `${alternativeStorageUrl}${path}`
+
 let instanceApp: FirebaseApp = initializeApp(config)
 export const instanceFirestore: Firestore = getFirestore(instanceApp)
 export const storage = getStorage()
diff --git a/src/utils/images/uploadImage.ts b/src/utils/images/uploadImage.ts
index 278653fd..eceb081e 100644
--- a/src/utils/images/uploadImage.ts
+++ b/src/utils/images/uploadImage.ts
@@ -1,12 +1,34 @@
 import { ref, uploadBytes } from 'firebase/storage'
-import { storage } from '../../services/firebase'
+import { pathToStorageUrl, storage, storageUrlToPath } from '../../services/firebase'
 import { v4 as uuidv4 } from 'uuid'
 
+const MIME_EXTENSIONS: Record<string, string> = {
+    'image/jpeg': 'jpg',
+    'image/jpg': 'jpg',
+    'image/png': 'png',
+    'image/webp': 'webp',
+    'image/gif': 'gif',
+    'image/svg+xml': 'svg',
+    'image/avif': 'avif',
+    'image/bmp': 'bmp',
+}
+
+const getBlobExtension = (blob: Blob): string => {
+    const mime = blob.type.split(';')[0].trim().toLowerCase()
+    if (MIME_EXTENSIONS[mime]) {
+        return MIME_EXTENSIONS[mime]
+    }
+    const subtype = mime.split('/')[1]
+    return subtype ? subtype.replace('+xml', '') : 'jpg'
+}
+
 export const uploadImage = async (imageFolder: string, image: Blob): Promise<string> => {
-    const fileName = uuidv4()
+    const fileName = `${uuidv4()}.${getBlobExtension(image)}`
 
-    const outputRef = ref(storage, `${imageFolder}${fileName}`)
+    // imageFolder may be a full public URL; reduce it to a bucket-relative path
+    const folderPath = storageUrlToPath(imageFolder)
+    const outputRef = ref(storage, `${folderPath}${fileName}`)
 
-    await uploadBytes(outputRef, image, {})
-    return `${imageFolder}${fileName}`
+    await uploadBytes(outputRef, image, { contentType: image.type || undefined })
+    return pathToStorageUrl(outputRef.fullPath)
 }